The sales at a particular bookstore grew from $2104 million in 2000 to $3881 million in 2005. Find an exponential function to model the sales as a function of years since 2000. Give your answer using the form B = Boat.

The usual exponential growth equation is given by:

y = C * e^kt, where k greater than 0.

t is the number of years, in this case (2005 - 2000), t = 5 years

C is a constant at x = 0

k is the growth constant

There will be two equations:

2104 million = C * e^k (0)

so, C = 2104 million, the other equation is:

3881 million = 2104 million * e^k (5)

solve for k:

k = 0.12245

The exponential growth equation is:

y = 2104 million * e^ (0.12245*t)