write an exponential function - I set a 16 1b. block of ice out in the sun on a hot day. 2 hours later I came back and weighed the remaining ice. it weighs 9 lbs. if I know that ice melts at an exponential rate, write an equation that can be used to model the weight of the ice (w) after a given number of hours (h) use your equation to predict the weight of the ice at 5 hours.