(Solved): question 3 If a cup of coffee has temperature \( 100^{\circ} \mathrm{C} \) in a room where the ambie ...

If a cup of coffee has temperature \( 100^{\circ} \mathrm{C} \) in a room where the ambient air temperature is \( 18^{\circ} \mathrm{C} \), then, according to Newton's Law of Cooling, the temperature of the coffee after \( t \) minutes is \( T(t)=18+82 e^{-t / 52} \). What is the average temperature of the coffee during the first 28 minutes? average temp \( = \) C