The Mexican subsidiary of ThermoMaster manufactures an indoor-outdoor thermometer. Management estimates that the profit (in dollars) realizable by the company for the manufacture and sale of x units of thermometers each week is .
?
Find the intervals where the profit function P is increasing and the intervals where P is decreasing.
?

A. increasing on , decreasing on 
B. increasing on , decreasing on 
C. increasing on , decreasing on 
D. increasing on , decreasing on 
E. increasing on , decreasing on 


Answer: B

Mathematics

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