help-0

[mortal mica]

184

lets see what u did

[alpine swift]

60 (being the triangles)
74 (being the top rectangle)
30 (being the back side)
72 (being the bottom side)
20 (being the cube with 5 sides)

[mortal mica]

cool

looks right

[alpine swift]

Is it?

I don’t know if I did it right

[mortal mica]

why

what are u doubting?

[alpine swift]

You guys are pros at math and your getting different answers.

[mortal mica]

i didnt realize that cube was part of the shape, thought it was for scale

or smthn

[alpine swift]

Oh

I have two more questions to ask you

[mortal mica]

idk what addavocowana did

me? lol

[alpine swift]

They were probably tierd

[mortal mica]

u seem like h got it sorted

i got an exam in 10 hours

[alpine swift]

Me too lol hahah

What’s yours on?

[mortal mica]

nice

hydraulics

[alpine swift]

Oh nice

[mortal mica]

if i fail i redo the whole semester

yeah

very nice

i got <25% on the practice test

so uhh

[alpine swift]

What’s the formula to solve the surface area of a cylinder

[mortal mica]

hella confident

👍

[alpine swift]

I have a 60 in math

[mortal mica]

u know formula of perimiter?

of a circle

[alpine swift]

But 87s in everything else

[alpine swift]

Rpie something

[mortal mica]

thats it

but

[alpine swift]

2rpi

[mortal mica]

2πr

[alpine swift]

Right?

[mortal mica]

ye

now look at the cylinder

and think

what shapes u can split it into

[alpine swift]

Cercles and rectangle

[mortal mica]

cool

look at the aide of rectangle

calculate that

multiply by the hight

add the 2 circles

and u dont need my help

gtfo

👍

gl

.close is the command

i think

[alpine swift]

2pirh+2pir^2

Is that the formula?

[mortal mica]

idk check it, if it makes sense then yeah

math is logic

if ur steps are reasonable and make sense where what came from and how what when

then correct

as long as u can prove it

and then u run into mistakes when proving it but thats just mistakes

if no mistakes, its correct

enjoy

cya

.close

👍

[alpine swift]

https://youtu.be/PhA-7AE6MIU

.close

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[craggy basin]

if a circle has two congruent chords, how do you think are their corresponding arc measures related to one another?

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[alpine sable]

I solved it but the options don't match my answer, not sure where I went wrong. Need second opinions on this

My work I did

<@&286206848099549185> Am I meant to ping like this?

[tiny minnow]

So at the first u are correct u write $Speed of Dog = d meters/second$

[ocean seal]

IVMC Gaming CH

[alpine sable]

Hm? That's just the variable I chose though.

[tiny minnow]

the length of Row of soldiers is $= 100m$ is correct

[ocean seal]

IVMC Gaming CH

[tiny minnow]

Total of the dog traveled is $400 meters$ is correct

[ocean seal]

IVMC Gaming CH

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@alpine sable Has your question been resolved?

[craggy basin]

if a circle has two congruent chords, how do you think are their corresponding arc measures related to one another?

[alpine sable]

You're meant to ask in a non occupied channel

[craggy basin]

which channel

[alpine sable]

#help-9

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@alpine sable Has your question been resolved?

[alpine sable]

.close

[lone heart]

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[umbral spruce]

I get

(2-sqrt(3))/2

do I should I just but

1-1/2sqrt(3)

are you serious

this channel is clearly taken

please use #help-9 #help-13 #help-17

sorry what?

[rigid palm]

Maybe you are to dumb to understand

No worries

[umbral spruce]

?

what do you mean by adjust?

[rigid palm]

"Cooperate"

[fiery berry]

Hi this should be right

[umbral spruce]

Thanks

.close

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[fiery berry]

np

[lone heart]

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[rich fractal]

Idk where to ask such basic question there are lots of channels!

Anyways, I've been trying my best to learn this radical thing but I'm just too dumb I think!

So would it be right to say √ 12 is equal to 2 √ 12?

I heard its redundant to write 2 like in the second example because its automatically implied so whats the right answer then of √ 12?

2√3 or 4√3, using this logic below?

https://prnt.sc/20ihba4

Sorry if this was difficult to understand.

[zealous bloom]

Umm...2√3 is correct.

[umbral spruce]

um no

root 12

[rich fractal]

But the vid im watching says 2 is automatically implied so shouldnt it be the second answer then?

[umbral spruce]

is not equal to root 2root12

12 can be divided by 4

since 4 is a square number

12/4 = 3

soo

2root3

because when we take it out we square root the number

soo

root(3*4)

2root(3)

@rich fractal does this help?

[rich fractal]

Okay great, thank you

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[tropic sluice]

are there any special rules for computing infinite definite integrals by computing the indefinite integral and then calculating the value of the function at its end points?

[glass lichen]

Wdym by rules

[tropic sluice]

like guidelines we have to follow so we dont mess up

because things get quirky at infinity

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[tropic sluice]

anybody?

<@&286206848099549185> ?

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@tropic sluice Has your question been resolved?

[alpine sable]

id use limit

sub in a as bound

lim a->infinity

use 'a" as a normal value and explain what happens as tends to infinity, I.e convergence ot divergence

[static grail]

@tropic sluice

idk why the first page is rotated sorry lol

nvm it isnt

[alpine sable]

Oooof why solving trig equation is soo hard

How is that calculus seems easier than trig

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[frozen matrix]

how do we find local min and max for this

[smoky cloud]

is it +2 for max and -2 for min ?

[frozen matrix]

local maxes are (pi/18,2), 2pi/3,sqrt3

[smoky cloud]

oh u need points ?

[frozen matrix]

yeah

[smoky cloud]

differentiate and equate to 0
u get 1 value for x there
differentiate again and put that x there if it is less than 0 it gives maxima and if its more than it gives minima

u can simplify this function as 2sin(pi/3+3x)

[frozen matrix]

how

[smoky cloud]

multiply and divide by 2
we can write sqrt(3)/2 as sin(60)
and 1/2 as cos(60)

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[nova hearth]

I got no clue what this means

[nova hearth]

I dont understand it

[gloomy forge]

Its asking you to find the probability of 5 or 8
there are 8 numbers the spinner can land on: 2/8

convert 2/8 to a percentage

[wintry sage]

It says to give it as a fraction in the question

[nova hearth]

Soo it 1/4?

This one is a bit different

[placid zinc]

It's exactly the same

Except for the decimal bit. But if you can get it as a fraction, we can talk about the decimal

[gloomy forge]

Pr=favorable outcomes/total outcomes

[nova hearth]

I actually got no clue I dont understand it properly

[gloomy forge]

how many outcomes are there?

[nova hearth]

6

[gloomy forge]

how many is it asking for?

[nova hearth]

1

I think

[gloomy forge]

1/6

[nova hearth]

Pr (1)

[gloomy forge]

yes

1=favorable outcome
6=total outcome

[nova hearth]

yep

[gloomy forge]

do you know how to get decimal?

[nova hearth]

nope

[gloomy forge]

whats 1 divided by 6?

[nova hearth]

0.1 something

0.16?

[gloomy forge]

its asking for the 3rd decimal place

[nova hearth]

What does it mean by 3rd deciaml place

0.166

0.1666

is that what it is trying to say

[gloomy forge]

it would be 0.167 because you round up the 7

[nova hearth]

Oh I answered 0.1666 and it worked

[gloomy forge]

👍

[nova hearth]

Thanks alot for your help

[gloomy forge]

np

[nova hearth]

TYSM

[gloomy forge]

also, if its asking for a % just divide then x100

i.e 1/6=0.167x100=16.7%

[nova hearth]

ok

[gloomy forge]

this one im not so sue on

sure*

it says you have 6 red marbles, the Pr is 3/10

how would you make 3 become 6?

[nova hearth]

x2

[gloomy forge]

and if you multiply 3x2 you must multiply what else by 2?

[nova hearth]

10?

[gloomy forge]

yes

whatever you do to the top you have to do to the bottom

[nova hearth]

why x2 tho

[gloomy forge]

because 3 is the pr of red marbles, but you have 6

[nova hearth]

Mate ur actually clutch

thanks so much i learnt alot from you today

[gloomy forge]

👍

happy to help

[nova hearth]

Is this 162

???

@gloomy forge sorry for the ping but it is not 162 and I dont know how it isn't

[gloomy forge]

what is the question asking for?

[gloomy forge]

how many tiles are in the bag?

[nova hearth]

18

[gloomy forge]

and whats the denominator of the Pr?

[nova hearth]

9

[gloomy forge]

what must you do to 9 to make it into 18?

[nova hearth]

x2

[gloomy forge]

whats 1/9 x2?

[nova hearth]

idk

[gloomy forge]

just multiply the numerator and denominator by 2

[nova hearth]

Soo it 2?

because 1x2

= 2

[gloomy forge]

yes

[bleak ridge]

You can also just multiply the probability by the total number of items

Whichever makes more sense

The same formula number=probability * total could've been used to solve the previous problem also

[nova hearth]

Well Than Tysm all of you that help me with this and thorght me how to do it. Thanks alot

[gloomy forge]

np

[nova hearth]

<@&286206848099549185>

@gloomy forge

[gloomy forge]

tell me what you think you should do, i will correct you if you're wrong

[nova hearth]

I did 3x8 than 2x8 etc

omg

I got it

it 16

im so stupid

[gloomy forge]

is that what you put in for the answer?

[nova hearth]

yeah

because

2x2=4

so 8x2

will = 16

[gloomy forge]

nice

[nova hearth]

whatver you do to the top you do too the bottem

I remembered that just rn

[gloomy forge]

👍

[nova hearth]

Ur a legend thanks

[gloomy forge]

no problemo

[lone heart]

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[rancid matrix]

So ive had this headache of a math problem, its about calculating volume, its just text also, so the question goes :

Anna and Rasmus are having a children's party and thought of letting the children swim in their newly built outdoor pool. The pool has a length of 5 m, a width of 3 m and a depth of 1 m.

To their dismay, they realize they have no hose to fill the pool with. But fortunately, they have 4 cylindrical buckets with a radius of 10 cm and a height of 30 cm.

They decide to fill the pool by filling the buckets with water indoors and running out to the pool and pouring in. They can carry two buckets at a time.

If it takes 5 minutes for one of them to fill the buckets, run out, empty them in the pool and run in again.

How long before the party do they have to start in order to be ready in time?
Round off the answer to whole hours.

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[rancid matrix]

<@&286206848099549185>

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[inner sequoia]

how would i go about finding depth?

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[inner sequoia]

<@&286206848099549185> how would i go about finding depth

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[hollow shuttle]

GCF and LCM

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[low current]

can i ask for help pls, A paint manufacturer proposed that the cylindrical containers to hold 40 liters of paint must have its diameter equal to the height for easy shipment. What will the diameter be?

[mortal mica]

what are you asking? @low current

u want to learn or u want the answer?

[low current]

learn sir

[mortal mica]

ok

whats the question

[low current]

how to solve this one

[low current]

thiis

[mortal mica]

u know formula for volume?

[mortal mica]

.185m

[low current]

for cylinder?

[mortal mica]

yes.

that is what it seems to be asking about

[low current]

pir^2h?

[mortal mica]

mhmm

it says what the h is

it says what the volume is

[low current]

so how to get without r?

[mortal mica]

pi is 3.14159

[low current]

i mean, it also asked for r since diameter is r*2

[mortal mica]

what?

oh yeah

its asking for diameter

which is 2r

so find r

u have the formula for volume

and u have the formula for hight dont u?

[mortal mica]

read that question

what does it say about hight?

[low current]

equal the diameter

so 2h?

[mortal mica]

what?

write down relationship between diameter and hight

using the information ur given

so u can see it

its more obvious when you are it in front of you

more clear*

[low current]

okaay okaay sir

i will be writing it wait

[mortal mica]

@ me when u rdy

[lone heart]

@low current Has your question been resolved?

[low current]

@mortal mica i tried and got 23.35 cm instead

40 x 1000 = 40000 cm

since h = d

pir^2h = pi*h^3

v = pi*h^3

then sqrt(40000/pi) = h

[mortal mica]

jesus dude 40k cm?

wtf

[low current]

cause its from liters

sorry

i thought i should convert it to centimeters

[mortal mica]

lul

ye can do ig

lol

umm

yup

except its not sqrt

itll be cbrt

cause its power of 3

not 2

u got the answer

cbrt tho instead of sqrt ;P

or just do (kgjdnr)^(1/3)

cause thats what it basically is

deviding the power

[low current]

i dont quite understand what u mean

its wrong right?

[mortal mica]

23cm is right

[mortal mica]

sqrt in this line reprisents √ yes?

which eliminates squares

"undoes" them

[low current]

THANK YOU SIR!

[low current]

yes yes

[mortal mica]

cube root eliminates cubes

which is what u have, h³

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[low current]

thnk you sir~

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[viral locust]

I dont get it, how to solve this ?

[lone heart]

@viral locust Has your question been resolved?

[viral locust]

Kinda confused in part b ? can someone explain it?

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@viral locust Has your question been resolved?

[chrome salmon]

You did part a?

[viral locust]

Yes

two matrices right

I do multiplied the,

them

but I dont know which are the total money to buy and total sales

[chrome salmon]

Show what you did

[viral locust]

200 164
150 128
100 92

24000 42000
15000 32000
40000 64000

this is for a

after I multiplied them :
11050000 19600000
9536000 16872000

I got this 2x2 matrices

[viral locust]

and for b, as I said, I dont know which matrices to find total money and total sales

[chrome salmon]

I'll check it soon

[lone heart]

@viral locust Has your question been resolved?

[fringe ember]

guys please close the channel if your questions have been resolved

[viral locust]

Not resolved anymore tho

since yesterday, Im always asking for solver

There is still no anyone

Cmon, Im not asking for the answer tho

[viral locust]

You can check to help-24 for what Im asking......

[chrome salmon]

I'm here now dw

[chrome salmon]

These diagonal elements will give the answer to a,b

[viral locust]

11 and 22??

[chrome salmon]

Yes

[viral locust]

Yeahh maybe the diagonal one, but how do we know that?

why must 11 22? how about the others?

[chrome salmon]

Because they give Cp×B and Sp×S
Where Cp is cost price and B is amount bought
Sp is selling price and S is amount sold

[viral locust]

Ahhh so thats why

thank you so much

.close

[lone heart]

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[glad surge]

Hi how would you solve this question?

[lone heart]

@glad surge Has your question been resolved?

[chrome salmon]

You know how to deal with that 20?

[glad surge]

honestly

no

i have no idea what is going on

[chrome salmon]

You know properties of determinants

[glad surge]

yeah

1/ad-bc

[chrome salmon]

Not that

I'll send you a link to website showing you properties of determinants

And you solve this accordingly

[glad surge]

ok

would you say this is a hard question?

hello?

[chrome salmon]

No it's a one step question

[glad surge]

when you say properties of determinants

what do you mean?

since there are alot of properties of determinants

[chrome salmon]

https://image.slidesharecdn.com/matrixalgebra-150114150236-conversion-gate02/95/matrix-algebra-25-638.jpg?cb=1421248022

[glad surge]

hmm okay

so for the rows that have 20

its 20 (e + d+f)

so what would happen next?

[chrome salmon]

Think about it properly

[glad surge]

is the answer 4?

okay its not

I did 20 * 1/5=4

[chrome salmon]

Try it

[glad surge]

28 * 1/5 =4?

4 is not the correct answer

[chrome salmon]

Do you know about exchanging column

[glad surge]

yeah

[chrome salmon]

What happens when you do that

[glad surge]

would the answer still be the same

[chrome salmon]

No -4

[glad surge]

why is it -4?

[chrome salmon]

Because the column 1 and column 2 are exchanged

[glad surge]

oh ok

i never thought swapping rows can cause a negative result?

[chrome salmon]

That's what I asked you above and you said yes

[glad surge]

I know we can swap rows in matrices but i never knew it can turn negative

[chrome salmon]

Determinant makes difference

[glad surge]

oh okay

thank you for your help

[chrome salmon]

Close the channel @glad surge

[glad surge]

!close

.close

[lone heart]

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[glad surge]

sorry how is f'(9)= 18?

[tropic sluice]

limit def of derivative ig

[glad surge]

?

do i have to derive the function first?

[tropic sluice]

no no

$$f'(x) = \lim_{h \to 0} \frac{f(x + h) - f(x)}h$$

here f(x + h) will be the expression for x != 9 and f(x) will be 81

then u do albegra

[glad surge]

sorry im so confused

[vale wigeon]

you are forgetting the lim[h -> 0]

[glad surge]

I know the function is first principles

[tropic sluice]

do you know what a derivative means?

[glad surge]

yeah

[tropic sluice]

oops

[ocean seal]

thenotsoOP

[glad surge]

hmm

okay so i know the limit and derivatitve

but idk what to do sorry

[tropic sluice]

well at 9 f(x) = 81, right?

so that part is 81

then f(x + h) will be the other expression

[glad surge]

okay like

[glad surge]

i get this part

[glad surge]

but i dont understand this sorry

[tropic sluice]

f(x + h) = (x + h - 9)^5 sin(1/(x + h - 9)^4) + (x + h)²

then do algebra with that

[glad surge]

okay thank you

[lone heart]

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[lone heart]

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[alpine sable]

can someone help me out with this one?

[harsh belfry]

Currently trying to solve this problem

However I have multiple variables I'm working with that I'm not too sure how to manage

The question is asking that I use the formula for surface area

SA=2lw+2lh+2hw = 541.5

to find volume

V=lwh

If the base of the rectangle is a square

width length would be equal right?

(Optimization Calculus)

[alpine sable]

why u multiple?

you are given surface area not volume

[alpine sable]

if you use this then 541.5=2 * x * x + 2 * x * y + 2 * x * y

then you can solve for y

[harsh belfry]

Ah I see

[alpine sable]

and then put that to volume formula which in your case will be V=x * x * y

[harsh belfry]

Oops

I get it now!

Thanks

close

.close

[lone heart]

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[lime peak]

.reopen

[wet finch]

find the value of x/6 + 2
When x=12 and x=18

[wet finch]

can someone help?

<@&268886789983436800>

pls?

[sly mantle]

pls don't ping mods for hw help

[wet finch]

.close

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[sly mantle]

integers mod n

[lone heart]

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[alpine sable]

Could someone please help me with this question, I'm struggling to see how it gets to 0.006?

Well, how this would be calculated

I think it's called a compound function, but I have no idea where to start when it comes to getting that answer

Do you just have to do each one, one by one slowly?

[lone heart]

@alpine sable Has your question been resolved?

[alpine sable]

What exactly do you mean by that?

[chrome salmon]

Seems like that looking at parameters

[alpine sable]

yes

[alpine sable]

pmf?

P(X)?

What exactly does P(X=x) mean?

[alpine sable]

Sample space is outcomes I believe

but I'm pretty lost for the most part

[alpine sable]

What does the : do in this case?

If right then left?

something like that?

I don't really understand X being a function

very little, we've only had one lecture on probability

But it's going to be on my test

We were just told things without being told what they mean, or how they work

So I'm struggling to piece things together

I'm certainly trying

0 and 1 are x values here?

X = {x1, x2} or X = {0, 1}
Something like that?

[glass lichen]

X outputs into {0,1}, yes

[alpine sable]

P(X=0) = 0.5
P(X=1) = 0.5
?

but n would have to be either 0 or 1 in this case right?

[glass lichen]

Oh

[alpine sable]

P(x | n, p)
We did something like that

n is 100 yes

Oh, I was talking about the heads/tails thing in that case

That makes sense

Does that mean including the upper and lower bounds? Could be completely wrong, going on something from a different module

1 in that case

It's stated as fair if that helps

[lone heart]

@alpine sable Has your question been resolved?

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[alpine sable]

I need help

[alpine sable]

<@&286206848099549185>

[bleak ridge]

Which of those equal the same thing as the first expression

[alpine sable]

huh>

?

[weak elm]

do you know PEMDAS?

[alpine sable]

Yeah kinda

i really wasnt good at it though

[weak elm]

well then apply it to those four expressions

parentheses first

then multiplying

and then sum it all

what is 8*3?

[alpine sable]

24

[weak elm]

yup

what is 6*8?

[alpine sable]

48

correcT?

[weak elm]

yeah

[alpine sable]

okay

[weak elm]

now add it up

[alpine sable]

72

[weak elm]

what does it equal?

exactly

is 72 the same as 18+48?

[alpine sable]

no

[weak elm]

exactly

so it can't be the first one

now apply this to every single option

[alpine sable]

so its the fourth one

correct

?

[weak elm]

yes, but there is one more

which one?

[alpine sable]

3rd one

right?

It was correct

thank you

.close

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[ancient lava]

Is my workings so far correct ?

And I want to ask if there is any other way that it can be done better

Also it's about probability

[bold lion]

I'm sleep

Dream

[lone heart]

@ancient lava Has your question been resolved?

[ancient lava]

Also would like to ask for help for the last question

[ancient lava]

Oh hye

Isn't it a teenager only ?

But in the question

It said, T is a set of teenagers ?

Which part if I may ask ?

Ahh all of them are wrong ?

Oh well, I ask here before, and when I got the solution, I just followed it

It look logical and the right answer

Only for the first question

The rest I did it on my won

own *

0.095 right ?

Well, we want to find out if a teenager if a facebook user

10 % of the residents are teenagers

So then

95 % of the teenagers are facebook users

So it's 95 % of 10 %

Whcih is

9.5 %

0.095

Oh yeah that's true

That would be

95 % of teenagers are facebook users

Oh true

I guess I don't know how to show it

Oh I just notice this

Wait so

P ( F Intersect T )

A teenage facebook user right ?

How do we show it then ?

I got stuck doing that because I don't know hwo to write it without a certain number of population

This was my working whcih I got stuck on the other day

[ancient lava]

Oh you mean

P ( A|B)

?

IN this case

It will be

P ( F | T )

Right ?

If so, then

P( F | T ) = P ( F Intersects T ) / P (T )

I can right P (T) as 0.1 right ?

Also what's the difference between these 2 question

Why is the P ( F intersect T ) the same for btoh question

But one question ask the probability that a resident is a teenager and a facebook user, but the other one is non teenager

Oh wait

Pr ( F | T ) is the probability that a person is a facebook user, that it's a teenager

Right ?

I see

Alright

So that's what you said

95 % right ?

Whcih is teenager who uses facebook

Which is *

Wait so

According to my calculations

P ( F Intersect T ) = 0.095

Alribht

Alright

[ancient lava]

Sure

Wait like

95 % Of T is F

60 % of Residents is also F

So add these 2 together ?

I don't know how to do it to be honest

[ancient lava]

P ( F Intersect T ) is 0.095 right ?

Also id it true that P (F|T) = P(T|F)?

I see

Based on what we found I got this

[ancient lava]

Yep

I think I'll just take a break

I tried doing P ( T|F) to get P (F)

But when I got the answer for P(F) it was

0.1

Which is not logical saying that the probability of a resident is a facebook user is 10 %

So this is not true in this case ?

oh

Alright

But I'll just take a break and think about it tommorow

Thank yo

you

Thank you

.close

[lone heart]

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[ashen cave]

I dont understand how it helps figure out the planes of symmetry

.close

[lone heart]

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[median garnet]

Im not sure about how to approach this problem

I think it diverges

[split oriole]

Try to use alternate series test

[median garnet]

I got that it converges to 0 does that seem right

[placid zinc]

Are you asked for the value of the sum?

What did you do to find 0?

[median garnet]

Well it turned into 1/infinity

[placid zinc]

It?

[median garnet]

What did you get?

[lone heart]

@median garnet Has your question been resolved?

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[alpine sable]

how can I continue here? need to analyze monotonic behaviour of a function

[placid zinc]

If ab = 0
Then either a = 0 or b = 0

[smoky cloud]

x=0,-4 crit points ( from what kaynex said )

[alpine sable]

Thanks, was confused but now its clear

[alpine sable]

yup 😄

[smoky cloud]

so from that find in which interval the fun is inc dec
that will be better to analyze the function

[alpine sable]

well but e^(0+1) is not 0

i think your first crit point is wrong

[placid zinc]

Right, e^(x + 1) has no roots, so nothing happens there

All of the magic happens at x² + 4x = 0

[alpine sable]

so I only need to analyse the right part right?

yeah ok 😄

[smoky cloud]

x^2+4x = x(x+4) right ?

so there gets ur -4 and 0

[alpine sable]

ohh yeah I got you now

Playmaker

my mistake

[smoky cloud]

np np

[alpine sable]

thanks

[smoky cloud]

all cred goes to kaynex

he told I applied thats it

if u still got doubt u can dm too on this

[lone heart]

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[velvet osprey]

How do I show green-ostrogradski theorem ?

[lone heart]

@velvet osprey Has your question been resolved?

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[hasty gale]

I would like to know how to work with level curves

I cant seem to wrap my hear around it

[glass lichen]

to find the contours, you want f(x,y)=c for some fixed c

so for example, the contours of a are $c=x^2+y^2$ where you get nothing for $c<0$, the origin for $c=0$ and circles of radius $\sqrt{c}$ centered at the origin when $c>0$

[ocean seal]

Mosh

[hasty gale]

yep

understood

how would we know those contour lines show f(x,y) = xy?

what are somethings I should consider

[glass lichen]

c=xy iff y=c/x

[hasty gale]

right

[glass lichen]

which are hyperbolas

[hasty gale]

so its like the graph of 1/x

[glass lichen]

it's y=c/x

or the axes when c=0

[hasty gale]

where c is a constant?

[glass lichen]

yes.

Like I said in my example

[hasty gale]

if its a hyoerbola wouldbt it be b

[glass lichen]

y=c/x are rectangular hyperbolas

,w graph y=1/x

[ocean seal]

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Requested by Omegabet_#9771

[hasty gale]

in this case the graph looks like its -1/x

would that be because

[glass lichen]

c=-1

[hasty gale]

f(x,y) is negative

ok

[glass lichen]

Yes, cause you're intersecting f with the plane z=-1

,w graph z=xy

[hasty gale]

mmm yep that makes sense

one last thing

[ocean seal]

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[hasty gale]

if I were to have a contour for option e

z = x + y

then would it be a straightline contour,, with negative gradient?

[glass lichen]

yes

and y intercept c

since y=c-x

[hasty gale]

mmm okok and option a would be a circle

I understand

thank you !

[lone heart]

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[lone heart]

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[unkempt swallow]

?

??

hi

[buoyant edge]

What have you tried so far/

?

[unkempt swallow]

i don't get it

so like nothing

[buoyant edge]

Okay. Take the information you're given. Do you know what perimeter is?

[unkempt swallow]

Yeah

it says it at the top

v

[glass lichen]

do you know what perimeter is?

[unkempt swallow]

uh no?

this is the whole pic btw

[glass lichen]

so check your notes for what perimeter is..

[unkempt swallow]

i dont have notes..

[glass lichen]

So google it then

[unkempt swallow]

i already have but idk ill do it again

[glass lichen]

First thing you should do if there's a word you don't know is to google its definition..

[unkempt swallow]

oh

im done here then :)

[lone heart]

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[sonic crag]

https://media.discordapp.net/attachments/778358532160487455/912805848538026045/unknown.png

#3 is the problem and my work is above for that. it's plurality, the professor said it's right but done wrong

[lone heart]

@sonic crag Has your question been resolved?

[sonic crag]

nope

[junior thicket]

Since Tate's win needs to be assured, amount of vote Tate needs to get needs to be larger than the amount of voters the second biggest candidate gets even if the second one got all the remaining votes
so 315+x>343+(1000-850-x)

[sonic crag]

ty!

[junior thicket]

you're welcome

[sonic crag]

.close

[lone heart]

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[alpine sable]

how do you solve this

i tried working backwards using the given definitions but i can't eliminate the negative

so i figure there's probably something else i need to do

oh i just saw this isn't for university level stuff, haven't used this in a while

.close, sorry about that

.close

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[lone heart]

@naive flint Has your question been resolved?

[lone heart]

@naive flint Has your question been resolved?

[tight locust]

hahahaha

this can't be real

[lone heart]

@naive flint Has your question been resolved?

[naive flint]

@tight locust it’s a mock exam I’m trying to work through

What do you mean “this can’t be real” ?

[alpine sable]

I FUCKING FOUND IT

Is the answer E

[naive flint]

Is it like really simple or something lmao

I’m shit at calculus this is my first college math class

[alpine sable]

Lmao i dont know

All I found was the inflection points and substituted the values

I mean

not the inflection points

[naive flint]

Critical points?

[alpine sable]

yeah

they were 4 and -1.5

[naive flint]

My teacher is so bad bro, he plays a video of his recordings for his online classes

And sits down and doesn’t talk

The whole clsss

[alpine sable]

Bro you won't believe me, My friend's teacher is such an ass he asks the class topper to play the video and himself leaves.

[naive flint]

Hahhaha

[alpine sable]

I found the derivative of f(x) and equated it to be zero since the f(x) = 0 is always a critical point.

Then found the roots of the quadratic and substituted the values accd. to the question.

I haven't seen so many functions in one question in my life

[naive flint]

The last questions made me want to die

Question*

It’s kind of like the 1st questions x2

[alpine sable]

If I was you I would eat rat poison and get sick to avoid the main test xD At least I would get passing marks in the exam.

[naive flint]

the good thing is the test is online with no lockdown browser lmfao

[alpine sable]

That's great lmfao

[naive flint]

Yeah lmao, me and a group of 6 other people take it together 😂

[alpine sable]

aight I have to go and study for my exam. Bye 👋

[naive flint]

Later

[lone heart]

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[quick echo]

What is the volume of the liquid displaced in water if the buoyant force is 888 Newtons?

[quick echo]

I cant find any formulas for this problem

hmmm

[severe sluice]

uh
it's the same as the weight of the displaced fluid

(is it called archimedes's principle or something?)

[quick echo]

that's volume?

[severe sluice]

not always

[quick echo]

only force is given tho

ahhhhh

[lone heart]

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[alpine sable]

Can someone help me with questions 19 I'm confused since I'm not sure if there's sufficient information to calculate the answer (I'm trying to fin n)

[velvet pelican]

I think there's sufficient information

[alpine sable]

please explain

[velvet pelican]

Try thinking about ||areas||

[alpine sable]

8*12

96

[velvet pelican]

In particular ||make the top left to bottom right diagonal and find the areas of the 2 triangles||

[alpine sable]

but then i dont know where to go after that

ok

ill try that

oh i see

its 96/2

then 48/10

thanks

but i have one more question

2 a)

wait

2. b)

not 2. a)

[velvet pelican]

I don't think that's enough information

[alpine sable]

Ok thanks

.close

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[alpine sable]

Is this correct?

[wary stream]

Yes, looks right

[alpine sable]

Thanks

.close

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[fringe ember]

https://byjus.com/maths/parallelogram/https://byjus.com/maths/parallelogram/

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[alpine sable]

The hint suggests to use f(a + d) = f(a), I solved this using x = a_0*k, k belongs to integer and is positive but dont understand how can i use the hint in the book to solve this question, any help would be appreciated

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[fallen patio]

We know that for maximum h, dh/dt= 0. But isn't it the same condition for minimum h? So, how do I know whether the "h" I found was maximum or minimum?

[fallen patio]

I know that for maximum,
d²y/dx²<0
And for minimum,
d²y/dx²>0

[fallen patio]

But, this wasn't used in the answer that I have been given for this question.

They straight up used dh/dt=0 and then found the value of t. But how do I know whether it is for maximum h or minimum h?

[charred flint]

you have to know what the function looks like

this one has -t^2, so it's a downward facing parabola and all dh/dt=0's will be maximums

and it's kind of implied that throwing a particle in the air has no minimum, since it can just keep falling

[fallen patio]

From where do I learn to know what a function looks like?

[charred flint]

it's about the term with the largest exponent, and whether it's positive or negative

[fallen patio]

Ohh
What if it's positive?

[charred flint]

it gets flipped

like just know these sorts of shapes

[fallen patio]

Ik that quadratic has a parabola and stuff
But how do I know it is facing upwards or downwards?

[charred flint]

• is facing up

• is facing down

[fallen patio]

For cubic or any other polynomial too?

[charred flint]

as in the coefficient of the largest exponent term

yeah

well odd exponents sort of go both ways

[fallen patio]

Ok
So, if the co-efficient is positive it is facing upwards?