During a month-long advertising campaign, the total sales S of a magazine is modeled by the function S(x) = 5x2 + 90x + 10,000, where x represents the number of days since the campaign began, 0 sxs 30. (a) What is the average rate of change of sales from x = 15 to x = 25 days? AS Ax sales/day = (b) What is the instantaneous rate of change S'(7) of sales when x = 7 days? S'(7) = sales/day
During a month-long advertising campaign, the total sales S of a magazine is modeled by the function S(x) = 5x2 + 90x + 10,000, where x represents the number of days since the campaign began, 0 sxs 30. (a) What is the average rate of change of sales from x = 15 to x = 25 days? AS Ax sales/day = (b) What is the instantaneous rate of change S'(7) of sales when x = 7 days? S'(7) = sales/day
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter3: The Derivative
Section3.CR: Chapter 3 Review
Problem 8CR
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