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Calculus: Early Transcendentals
8th Edition
ISBN: 9781285741550
Author: James Stewart
Publisher: Cengage Learning
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A company's profit P (in dollars) from selling x units of product can be modeled by
P (x)=500x-(1/2)x^2
The sales are increasing at a rate of 20 units per day. Find the rate of change of the profit with respect to time (in days) when 400 units have been sold.
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