A candle is lit and the length of the burning candle changes at a constant rate of -2.4 inches per hour. 3 hours after the candle was lit the candle was 12.8 inches long.

A. determine all fixed quantities

b. determine all varying quantities

c. which kind of function do you use to solve this problem

d. determine how long the candle was before it was lit

e. write formula that expresses the remaining length L of the candle in inches in terms of the number of hours t that have been clasped since the candle was lit.