Solve the problem.P(x) = -x3 + x2 - 60x + 100, x ? 5 is an approximation to the total profit (in thousands of dollars) from the sale of x hundred thousand tires. Find the number of hundred thousands of tires that must be sold to maximize profit.

A. 4.5 hundred thousand
B. 5.5 hundred thousand
C. 4 hundred thousand
D. 5 hundred thousand


Answer: D

Mathematics

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