What were the sales (in billions of dollars) at the beginning of 1998?

Question

The annual sales of digital signal processors (DSPs) in billions of dollars is approximated by

S(t) = 0.14t² + 0.68t + 3.1    (0 ≤ t ≤ 6)

where t is measured in years, with t = 0

 corresponding to the beginning of 1997.† (Round your answers to two decimal places.)

Answer 1

At the beginning of 1998 t = 1.

Substitute this value in the formula and simplify.