Solve the problem.P(x) = -x3 + x2 – 60x + 100, x ≥ 5 is an a…
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 tires that must be sold to maximize profit.