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 T₁, the body will either cool or warm to temperature T(t) after t minutes, where T(t)=T₀+(T₁-T₀)e^-kt. A cup of coffee with temperature 160F is placed in a freezer with temperature 0F. After 15 minutes, the temperature of the coffee is 47F. Use Newton's Law of Cooling to find the coffee's temperature after 20 minutes.