The sales of a new high-tech item (in thousands) are given by
S(t) = 91 - 80
-0.41
where t represents time in years. Find the rate of change of sales at each time.
a.) After 1 year. b.) After 5 years. c.) What is happening to the rate of change of sales as time goes on? d.) Does the rate of change of sales ever equal zero?
.
a. The rate of change after 1 year is thousand items per year.
(Round to three decimal places as needed.)