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A company introduces a new product for which the number of units sold S is given...

A company introduces a new product for which the number of units sold S is given by the equation below, where t is the time in months.

S(t) = 155 (7 − 9/ (2 + t))

a) Find the average rate of change of S(t) during the first year.

(b) During what month of the first year does S '(t) equal the average rate of change?

Math   Calculus   
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