Hot tea is brought to a boil at 212F and must be cooled to a temperature of 160°F The room temperature is 68°F
Newtons law of cooling can be used to find how long it takes a liquid to be cooled. The formula T= (To-Tr)e^-rt +Tr where Tr is the air temperature, To is initial temperature, T is the expected temperature, and r is rate of cooling and t is time in minutes. How long does it take for tea to cool if the rate of cooling is 0.05?
A. 3.9
B. 9.0
C. 12.9
D. 37.9