The quarterly profit (in thousands of dollars) of Cunningham Realty is given by P(x) 3D 극 -x² + 8x + 40 (0 < x < 50) where x (in thousands of dollars) is the amount of money Cunningham spends on advertising per quarter. (a) Find P'(x). P'(x) = (b) What is the rate of change of Cunningham's quarterly profit if the amount it spends on advertising is $12,000/quarter (x = 12)? (Round your answer to three decimal places.) $ per dollar spent on advertising What is the rate of change if it spends $32,000/quarter (x = 32)? (Round your answer to three decimal places.) %3D $ per dollar spent on advertising

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The quarterly profit (in thousands of dollars) of Cunningham Realty is given by
P(x) 3D 극
-x² + 8x + 40
(0 < x < 50)
where x (in thousands of dollars) is the amount of money Cunningham spends on advertising per quarter.
(a) Find P'(x).
P'(x) =
(b) What is the rate of change of Cunningham's quarterly profit if the amount it spends on advertising is $12,000/quarter (x = 12)? (Round your answer to three decimal places.)
$
per dollar spent on advertising
What is the rate of change if it spends $32,000/quarter (x = 32)? (Round your answer to three decimal places.)
%3D
$
per dollar spent on advertising
Transcribed Image Text:The quarterly profit (in thousands of dollars) of Cunningham Realty is given by P(x) 3D 극 -x² + 8x + 40 (0 < x < 50) where x (in thousands of dollars) is the amount of money Cunningham spends on advertising per quarter. (a) Find P'(x). P'(x) = (b) What is the rate of change of Cunningham's quarterly profit if the amount it spends on advertising is $12,000/quarter (x = 12)? (Round your answer to three decimal places.) $ per dollar spent on advertising What is the rate of change if it spends $32,000/quarter (x = 32)? (Round your answer to three decimal places.) %3D $ per dollar spent on advertising
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