Sales The sales S (in billions of dollars) for walgreens from 2000 through 2010 can be modeled by the exponential function
S(t) = 22.52(1.125)t
Where t is the time in years,with t = 0 corresponding to 2000.
(a) Use the model to estimate the sales in 2014.
(b) Use the model to estimate the sales in 2018.