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A company estimates that it will sell N(t) hair dryers after spending $t thousands on advertising as given by the following equation. For which values of t is the rate of sales N'(t) increasing? N(t)= -3t³+ 450t² - 21,600t + 1,100, 40 ≤t≤ 60 A. 4040 C. 40

A company estimates that it will sell N(t) hair dryers after spending $t thousands on advertising as given by the following equation. For which values of t is the rate of sales N'(t) increasing? N(t)= -3t³+ 450t² - 21,600t + 1,100, 40 ≤t≤ 60 A. 4040 C. 40

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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A company estimates that it will sell N(t) hair dryers after spending $t thousands on advertising as given by the following equation. For which values of t is the rate of sales N'(t) increasing? - 3t³. +450t² - 21,600t +1,100, 40 ≤t≤60 N(t)= - A. 40<t<50 B. t> 40 C. 40<t<60 D. 50<t<60
Transcribed Image Text:A company estimates that it will sell N(t) hair dryers after spending $t thousands on advertising as given by the following equation. For which values of t is the rate of sales N'(t) increasing? - 3t³. +450t² - 21,600t +1,100, 40 ≤t≤60 N(t)= - A. 40<t<50 B. t> 40 C. 40<t<60 D. 50<t<60
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