Solve the problem.The sales in thousands of a new type of product are given by S(t) = 100 - 60e-0.8t, where t represents time in years. Find the rate of change of sales at the time when t = 3.
A. 4.4 thousand per year
B. 525.3 thousand per year
C. -525.3 thousand per year
D. -4.4 thousand per year
Answer: A
Mathematics
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