The figure shows graphs of the marginal revenue function R€™ and the marginal cost function C€™ for a manufacturer. [Recall from Section 4.8 that R(x) and C(x) represent the revenue and cost when 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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R(x) 2- C'(x) 1+ 50 100 3.