As you know, Newton's law says that your Temperature function is
T(t) = 70 + 280e^-kt
So, just solve for k in
70 + 280e^-20k = 210
then solve for t in using T(t) = 155.
A loaf of bread is removed from an oven at 350 degrees F and cooled in a room whose temperature is 70 degrees F. If the bread cools to 210 degrees F in 20 minutes, how much longer will it take the bread to cool to 155 degrees F. Round to the nearest minute.
1 answer