The Sales of a Mature Product (One Which Has Passed $S _ { ( t ) } = S _ { 0 } e ^ { - a t }$

Multiple Choice

The sales of a mature product (one which has passed its peak) will decline by the function $S _ { ( t ) } = S _ { 0 } e ^ { - a t }$ , where $t$ $s$ time in years. Find the sales after 16 years if a $= 0.19$ and $S _ { 0 } = 81,600$ .

A) 98,675 products
B) 2,062,820 products
C) 1952 products
D) 3903 products