The yield V (in pounds per acre) for an orchard at age t (in years) is modeled by the function below.
V = 7955.9e-0.0452/t
At what rate is the yield changing at each of the following times? (Round your answers to two decimal places.)
(a) t = 5 years ______________pounds per acre per year
(b) t = 10 years______________pounds per acre per year
(c) t = 25 years______________pounds per acre per year