According to Newton's Law of Cooling, if a body with temperature T₁ is placed in surroundings with temperature T_o, different from that of T_1, the body will either cool or warm to temperature T(t) after t minutes, where T(t)=T₀+(T₁-T_o)e^-kt.

A cup of coffee with temperature 155 degrees F is placed in a freezer with temperature 0 degrees F. After 15 minutes, the temperature of the coffee is 46 degrees F.

Use Newton's Law of Cooling to find the coffee's temperature after 20 minutes.

After 20 minutes the coffee will have a temperature of degrees F.