Multiple Choice
Solve the problem.
-A company estimates that it will sell N(t) hair dryers after spending $t thousands on advertising as given by: For which values of t is the rate of sales N'(t) in
creasing?
A) 40 < t < 50
B) 50 < t < 60
C) 40 < t < 60
D) t > 40
Correct Answer:

Verified
Correct Answer:
Verified
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