A Publishing Company Has Published a New Magazine for Young $S ( t ) = \frac { 800 t } { t + 2 }$

Multiple Choice

A publishing company has published a new magazine for young adults. The monthly sales S (in thousands) is given by $S ( t ) = \frac { 800 t } { t + 2 }$ where t is the number of months since the first issue was published. Find S(3) and S'(3) and interpret the results.

A) At three months, the monthly sales are $480,000 and increasing at 64,000 magazines per month.
B) At three months, the monthly sales are $2, 400,000 and increasing at 64,000 magazines per month.
C) At three months, the monthly sales are $2,400,000 and increasing at 800,000 magazines per month.
D) At three months, the monthly sales are $480,000 and decreasing at 64,000 magazines per month.