Suppose a firm's total cost curve is TC = Q² + Q + 100. The firm's marginal cost is MC = ____. A) Q² + Q + 100 B) 2Q + 1 C) Q + 1 + (100/Q) D) Q + 1

Question

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The marginal cost (MC) is found by taking the first derivative of the total cost (TC) function with respect to quantity (Q). The derivative of TC = Q² + Q + 100 with respect to Q is 2Q + 1, as the derivative of Q is 1, and the constant 100 becomes 0 in the derivative.

Suppose a Firm's Total Cost Curve Is TC = Q2

Suppose a Firm's Total Cost Curve Is TC = Q²