The cost function of producing x items is C(x) = 4x² - 12x + 500. a) Find the marginal cost function (MC(x)). b) Evaluate the marginal cost function at x = 3 and interpret the answer. c) Find the average cost function (AC(x)).

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A: See this solution in below.

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A: Topic:  Limit and Continuity   The answer is given below:

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A: I am attaching image so that you understand each and every step.

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A: Option A is correct the detailed explanation is given below