The equation p(x)=−40x^2 + 8000x − 250000 takes x, the number of items produced of a particular new consumer electronic device, and gives P, the profit generated for the manufacturer (in thousands of dollars). Determine the maximum profit

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Q: R(p) = 600p - 6p^2 maximum revenue is 15,000 how many units are sold at this price?

A: