You place a cup of 205oF coffee on a table in a room that is 72oF, and 10 minutes later, it is 195oF. Approximately how long will it be before the coffee is 180oF? Use Newton's law of cooling:
Well i didn't use newtons law of cooling but i believe due to the rate of change t would be 15 minutes on top of the 10 minutes that have already passed