The profit P (in thousands of dollars) for a company spending an amount s (in thousands of dollars) on advertising is shown below.
P = −1/3 s3 + 9s2 + 400
(a) Find the amount of money the company should spend on advertising in order to yield a maximum profit.
s = thousands of dollars (b) The
point of diminishing returns is the point at which the
rate of growth of the profit function begins to decline. Find the
point of diminishing returns.
s = thousands of dollars
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