Problem 54E

The figure shows graphs of the marginal revenue function R and the marginal cost function C for a manufacturer. Recallfrom Section 3.7 that R(x) and Cx represent the revenue and cost when x units are manufactured. Assume that R and C are measured in thousands of dollars. What is the meaning of the area of the shaded region? Use the Midpoint Rule to estimate the value of this quantity.

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