at an ambient temprature of 72f from 160 to 149 f. Then if the ambient
temprature is 92f the coffee will cool to 140f in an additional 2 minutes (approx)
assuming the same rate constant.
However this is invalid because you will not have the same rate constant
with the cup being held as with it standing. This is because you no longer
have free flow of air around the cup. You cannot conclude anything without
doing the experiment to determine the appropriate rate constant for a held