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. t>40 OB. 50
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. t>40 OB. 50
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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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?
N(t) = -3t³ + 450t² - 21,600t+1,100, 40 ≤t≤60
A. t> 40
B. 50<t<60
OC. 40<t<60
D. 40<t<50
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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?
N(t) = -3t³ + 450t² - 21,600t+1,100, 40 ≤t≤60
A. t>40
B. 50<t<60
OC. 40<t<60
O D. 40<t<50
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