Precalculus Graph

[vestal ravine]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with: ```diff
   +close

[light mason]

As I understand this: considering that the clearance changes at a constant rate, you can see that it drops from 114 feet to 104 feet in 5 hours and 20 minutes, so every 32 minutes it drops 1 feet, for the crane to fit, the clearance needs to be at least 112 feet, which means that it can fit at low tide time(114ft), and then it can fit for another 32*2 =64 minutes or an hour and 4 minutes until the clearance drops to 112ft

I think that makes sense

[inland walrus]

hmm

so what would one of the answers be?

[light mason]

1 sec I'll write it down

oh wait

I made a mistake

[light mason]

It's 5 hours and 30 minutes not 20

So it drops 1 feet in 33 minutes

[inland walrus]

ohhh

so thats one interval but i can calculate the other ones by using the fact that 1ft drops in 33 minutes/

?

[light mason]

jesus, OK this is the final one, I once again inputed the wrong answer, my bad

[light mason]

If the low and high tides are periodical, then after the high tide which ocures at 10:55 a.m it should rise periodically 1 ft every 33 minutes until it reaches 114 ft and then drop again

you can imagine this change as a sin function

if that makes sense

well it's not exactly a sin function, If you would want to graph it it would look like:

\

But again, that's only if the high tides and low tides are periodical occurances, the problem doesn't mention it so ig it's only a guess

[inland walrus]

hmm

whats an easy way to change the time into numbers?

[light mason]

Since in the problem hours are reprisented as whole numbers and minutes as decimals, you just have to write the hour as a number and then divide the minutes by 60

[inland walrus]

ohh

so

[inland walrus]

the first interval is [5 5/12, 6 31/60]

like you mentioned

hmm wait a sec

another interval is between 3:19 pm and 4:25 pm

right?

[light mason]

3:19 and 5:31

if i counted correctly

because at 4:25 It's at 114ft and then it drops again so you add another 33*2=1 hour 6 minutes to it

[inland walrus]

and then

does the next interval start at 2:19 am?

[light mason]

that should be it because 2:19 am is another day

[light mason]

because this asks the time intervals for one day

[inland walrus]

ohhh

okok

[light mason]

We either crushed it or got it completely sideways lol, but it should be right because I don't see any other way to aproach this

[inland walrus]

i still got it wrong 😦

any idea why its wrong?

[light mason]

no clue

maybe try aproximating it to 2 decimals

but the problem doesn't state it

[inland walrus]

?

like this?

i think the problem wants it as decimals but i dont know how

[light mason]

yeap, but the problem is displayed so stupidly

It doesn't ask for decimals and aproximation, but inputing a fraction is somehow not correct

[light mason]

just use a calculator

and aproximate it

the answers we got are indeed correct though

[inland walrus]

like

5 5/12

is

65/12

and the decimal i got

was

5.416

repeating

so do i round to 5.417

?

or is it

5.42

?????????

[light mason]

you round this up to the thousand you get 5.417

[inland walrus]

but thats wrong

what shud i doooo

[light mason]

try putting this in

maybe it's not periodic

[inland walrus]

how do i put that in

im not sure if i can put in mixed numbers

[light mason]

[5.5/12,6.31/60]

[inland walrus]

5.5?

[light mason]

$5.\frac{5}{12}$

[south quail]

Kovaldas

[light mason]

or just without the dot

[inland walrus]

and then

6* 31/60?

[light mason]

ye

[inland walrus]

then

15* 19/60

to

17*31/60

?

i only hav 1 attempt left

[light mason]

damn

[inland walrus]

if this is wrong

i gotta solve a whole new problem

💀

[light mason]

I'd reccomend asking someone else to take a look also

[inland walrus]

all my friends r too busy