Question

The temp of a hot liquid is 100* Celsius and the room temp is 72* C. The liquid cools to 95.5 in 4 minutes. What is the temp after 14 mins?

Answer 1

dont get tricked by the room temperature, it's not needed here...

Answer 2

it's a related rates problem

Answer 3

set up ur function first

Answer 4

lemme give u a hint: y = temperature of the liquid and t = time in minutes, put temperature in terms of t

Answer 5

100 or 95.5..?

Answer 6

100

Answer 7

95.5 is when u plug in 4 as t and solve for the C variable which u'll get whenever ur integrating

Answer 8

I have never done integrating o.O

Answer 9

@11calcBC is it 86?

Answer 10

it's somewhere near that =[

Answer 11

sounds reasonable so yea it should be correct

Answer 12

LOL sry i didnt actually solve it...just guided u hope u dont mind :P

Answer 13

Can you please haha :P Just need this one question to be right then I can go to bed!

Answer 14

lol hang on then

Answer 15

WAIT LOL WTF

Answer 16

I KNOW 72 DEGREES CELSIUS IS NOT OKAY

Answer 17

if that's what you're about to say about the room temp xD

Answer 18

LOLOL no i just realized u can just treat this as a linear function

Answer 19

where y = 100 - 1.125t where y = temperature and t = time

Answer 20

plug in 14 for t and u get degrees LOL

Answer 21

omg biggest facepalm ever :DDD

Answer 22

Noooo it can't be 84 because the lowest avail option is 85 lol

Answer 23

u sure its asking for the exact value or the closest value?

Answer 24

Round your answer to the nearest degree, 84.25=84

Answer 25

i wud pick 85 lol sry outta time here

Answer 26

It was 87 :(

Answer 27

how? derp

Answer 28

are u sure? we didnt do anything wrong...

Answer 29

No idea lol

Answer 30

can you grab a calc and do ln(2)/0.019 and tell me the answer lol