題組內容

4. The rate of change in sales for Wal-Mart from 】991 through 2000 can be modeled by

where s is the sales (in millions) and t = 1 corresponds to 1991. In 1992, the sales for Wal-Mart were $55484 million.

(a) Find a model for sales from 1991 through 2000. (8%)