4-40. Qwest Airlines has implemented a program to recycle all plastic drink cups used on their aircraft. Their goal is to generate $5 million by the end of the recycle program’s five-year life. Each recycled cup can be sold for $0.005 (1/2 cent). (4.7)

a. How many cups must be recycled annually to meet this goal? Assume uniform annual plastic cup usage and a 0% interest rate.

b. Repeat Part

(a) when the annual interest rate is 15%.

c. Why is the answer to Part

(b) less than the answer to Part (a)?