maths I'm dumb

[torpid lion]

Help pls

[torpid lion]

I think that geometry idk tho

Geometry

[tough hollow]

which task do you need help with exactly?

[torpid lion]

Most

[tough hollow]

what have you done?

[torpid lion]

Number 5

[tough hollow]

Do you wanna begin with 1)

[torpid lion]

Why not

[tough hollow]

Ok did you notice that these are mixed fractions

$5\frac{1}{2} - 1\frac{2}{7}$

[tacit bridge]

adonhs

[tough hollow]

Do you even know what mixed fractions are?

[torpid lion]

No

I just play on my phone in maths

[tough hollow]

bruh

Say you have a fraction like:
$\ a\frac{b}{c} = a + \frac{b}{c}$

[tacit bridge]

adonhs

[tough hollow]

This is basically it

It's a shorter way to describe the sum of a whole number with a fraction

[torpid lion]

Oh

[tough hollow]

Is this information enough for you to evaluate it now?

[torpid lion]

Yeah I think

[tough hollow]

Then we can go to 2) or?

[torpid lion]

Yeah we can

[tough hollow]

Ok did you read task 2)?

a house in 2020 costs 250.000 $

each year the prices increases by 4 %

[torpid lion]

Yes

[tough hollow]

what is the prices in 2022

so we wanna know the price after 2 years

2020: 250.000 $
2021: ?

[torpid lion]

I think I ÷ something

Then +

[tough hollow]

we wanna calculate the interest

[torpid lion]

252.500

260.000

Was I close

[tough hollow]

It should be 260.000 in 2021

$\ I = \frac{capital \cdot rate}{100}$

[tacit bridge]

adonhs

[tough hollow]

Then our new capital is:
$\ capital_{new} = I + capital_{previous}$

[tacit bridge]

adonhs

[torpid lion]

Oh btw I done number 3

[tough hollow]

$\ I_{2021} = \frac{250000\cdot 4}{100} = 10000$

[tacit bridge]

adonhs

[tough hollow]

$\capital_{2021} = capital_{2020} + I_{2021}$

[tacit bridge]

adonhs

[torpid lion]

So answer is 270.000

[tough hollow]

Now quite

Youu need to do the whole procedure with the capital of 2021 for capital 2022

$\ I_{2022} = \frac{260000\cdot 4}{100} = 10400$

[tacit bridge]

adonhs

[tough hollow]

$\capital_{2022} = capital_{2021} + I_{2022}$

[tacit bridge]

adonhs

[torpid lion]

270.400

[tough hollow]

$\capital_{2022} = 260000+10400 = 270400$

[tacit bridge]

adonhs

[tough hollow]

You have to calculate the interest rate on the new price again for each year, not for the one in beginning

what's your result in number 3?

@torpid lion

[torpid lion]

70.666666

Idk if this is one where I need to do 3.14

[tough hollow]

I got something totally different

[torpid lion]

Well that not to good

Your probably right

[tough hollow]

$V_{cyl} = \pi \cdot r^2 \cdot h

\ V_{sph} = \frac{4}{3} \cdot \pi \cdot r^3$

[tacit bridge]

adonhs
Compile Error! Click the reaction for more information.
(You may edit your message to recompile.)

[torpid lion]

This is thing where need to do 3.14

[tough hollow]

you mean for pi? yeah you could do that

What can you say about the sphere

What happened with the sphere?

[torpid lion]

It's got fraction

And r3

[tough hollow]

No I don't mean the description of the formula

I mean if you look at the picture

of your shape

You can see a cylinder and a sphere but what happened to the sphere?

[torpid lion]

The 70 cm gets cut off

[tough hollow]

what do you mean exactly

What I am talking about is the sphere is cut in half

this is important

[torpid lion]

Oh shit poor sphere

[tough hollow]

So what happens to the volume of the sphere if it's cut in half?

[torpid lion]

It get ÷ by 2

[tough hollow]

very well done

So the whole volume V consists of:

$\ V = \frac{1}{2}V_{sph} + V_{cyl}$

[tacit bridge]

adonhs

[tough hollow]

Now let's calculate the poor sphere's volume first

[torpid lion]

Right okay

[tough hollow]

$\frac{1}{2}V_{sph} = \frac{4}{3} \cdot \pi \cdot r^3 \cdot \frac{1}{2}$

[tacit bridge]

adonhs

[tough hollow]

what is the the radius of the sphere?

[torpid lion]

70

[tough hollow]

NOPE

[torpid lion]

24

[tough hollow]

that's the diameter

[torpid lion]

Wait 2 secs

[tough hollow]

if 24 is the diameter what was the radius of the sphere

[torpid lion]

35? 70? 1? 100? 5millon?

[tough hollow]

what did you do in that time hahaha

Memorize this: The radius is always half the the diameter

The sphere is 24 cm long basically (diamter) so the radius is 12

[torpid lion]

Oh fuck

[tough hollow]

That's basically all we need so plugging in we get:
$\ \frac{1}{2}V_{sph} = \frac{4}{3} \cdot \pi \cdot (12)^3 \cdot \frac{1}{2} = 1152\pi [cm^3]$

[tacit bridge]

adonhs
Compile Error! Click the reaction for more information.
(You may edit your message to recompile.)

[tough hollow]

Anyway that's estimated:
$\ \frac{1}{2}V_{sph} ≈ 3619.11 [cm^3]$

[tacit bridge]

adonhs
Compile Error! Click the reaction for more information.
(You may edit your message to recompile.)

[tough hollow]

Now we need the volume of the cylinder

what's the radius and the height of the cylinder?

[torpid lion]

Oh shit

[torpid lion]

12 and 70 or 35 or 100millon fuck knows

[tough hollow]

Bro

stop giving up that fast

relax and think

[torpid lion]

I hate geometry

[tough hollow]

The whole shade is 70 cm high (including the poor sphere) but we want just the height of cylinder

[tough hollow]

you can do this

SO there must be a difference

To get the actual height

of cylinder

How long is the sphere?

vertically speaking

[torpid lion]

I'm sooo stupid I have been thinking the sphere was the cylinder 70

[tough hollow]

no problem

you are not stupid get that shit out of your head

[torpid lion]

Right

[tough hollow]

If we subtract the height of the sphere (vertically speaking) from the whole height 70 with what height are we left

70 is the whole thing take away the poor sphere

how much height is left

[torpid lion]

58 or 0

Idk how I got 0 but

[tough hollow]

0 doesnt make sense because other wise the cylinder would not have a height and would not exist thus it's 58 how come?

[torpid lion]

Because I done 12 take away 70

[tough hollow]

perfect, see you are not "stupid"

Now we have the height of cylinder h = 58 and the radius r = 12 plugging them in we get:

$\V_{cyl} = \pi \cdot (12cm)^2 \cdot 58cm = 8352\pi [cm^3]$

[tacit bridge]

adonhs
Compile Error! Click the reaction for more information.
(You may edit your message to recompile.)

[tough hollow]

$\V_{cyl} ≈ 26238.58 [cm^3]$

[tacit bridge]

adonhs
Compile Error! Click the reaction for more information.
(You may edit your message to recompile.)

[tough hollow]

Now what is the last and final step to do?

[torpid lion]

Add them

[tough hollow]

And that you can do on your own I trust

well done

[torpid lion]

29,857.69cm3

[tough hollow]

Task 4 is I think about proportions

3 ton food for 350 sheeps will last for 18 days

Now we have 100 sheep additionally, thus 450 sheeps in total

[torpid lion]

450 that too much

[tough hollow]

We know 350 sheeps need 18 days

[torpid lion]

Yes

[tough hollow]

So if we add more sheeps do you think the food will be gone sooner or later?

[torpid lion]

Sooner

Because one of them might be fat and eat it all

[tough hollow]

correct but dont be too specific

we would need to calculate how long the food would last for one sheep

[torpid lion]

Right

[tough hollow]

so 3 tons of food would basically last for one sheep 350 * 18 = 6300 days

[torpid lion]

Right

[tough hollow]

because the farmer has 350 sheeps / day

[torpid lion]

14 days?

[tough hollow]

if for one sheep 3 tons of food last 6300 days
then for 450 sheeps it will last: 14 days

[tough hollow]

yes

[torpid lion]

Nice is that it

[tough hollow]

yea

now whats left?

[torpid lion]

Mmmmmm

[torpid lion]

Is their more to question because if we are ill sent the last maths question

[tough hollow]

i dont think so that there is more

[torpid lion]

Hold up

[tough hollow]

Baby Andrew weighs 7.1 kg

A scoop contains 4.5 gramms of milk powder

[torpid lion]

Yes

[tough hollow]

baby milkpowder is sold in 900 gramms packs

what row of the tableau should we consider?

sorry i meant row haha

[torpid lion]

4.0 up to 5.0 or the 90 ml

3.5 up to 4.0

[tough hollow]

the baby weights 7.1 kg

so it's the second last

between 6.5 kg and 7.5 kg

[torpid lion]

Oh shit I done the wrong one lol

[tough hollow]

So the baby gets 4 milks a day

and for each milk 8 scoops are wasted

[torpid lion]

Oh shit shoot them

[tough hollow]

1 scoop = 4.5 g
8 scopps = 4.5g * 8 = 36 grams

so for one milk 36 grams are wasted

so for 4 milks = 36 * 4 gramms = 144 grams are wasted per day

so do you think a 900 gramm pack will last for one week?

[torpid lion]

Oh no bomb them

[tough hollow]

nah hell nah that baby will starve to death

[torpid lion]

Nope

Because I think it over 1000

[tough hollow]

144 gramms * 7 = 1008 grams of powder is needed for one week

but we only have 900 grams packs

the 900 gram pack will be over after 900gramms/144gramms = 6.25 days already

do you understand?

[torpid lion]

Yes

That us done

[tough hollow]

ok that was it i guess, you can close this case with .solved if there are not any questions anymore

[cosmic pine]

(Closing as the OP was muted)

.close