A cup of coffee has cooled from 98degreesC to 50degreesC after 15 minutes in a room at 25degreesC. How long will it take to cool to 40degreesC?
Someone else helped me on a problem similar to this, however I keep getting it wrong by decimals. i.e the answer is 35.987 but i put in 35.867
I can't imagine why I'm getting it wrong, ive checked and double checked my formulas over and over
Thank you
2 answers
https://www.jiskha.com/questions/1776107/A-cup-of-coffee-has-cooled-from-95degreesC-to-60degreesC-after-13-minutes-in-a-room
Too bad you didn't show your work...
25+(98-25)e^(-15k) = 50
k = 0.0714
So, to find t when T=40,
25+73e^(-0.0714t) = 40
Is this what you did?
If not, what did you do?
25+(98-25)e^(-15k) = 50
k = 0.0714
So, to find t when T=40,
25+73e^(-0.0714t) = 40
Is this what you did?
If not, what did you do?
1 answer