Shag Express,a retailer of lamps,has determined that its total cost of retailing lamps is TC = 200 + 10Q + 5Q².At 10 units of output,the firm's marginal cost is: A) $110. B) $100. C) $800. D) $230. E) $10.

Question

Quizplus · Accepted Answer

The marginal cost (MC) is the derivative of the total cost (TC) function with respect to quantity (Q). The derivative of TC = 200 + 10Q + 5Q^2 is MC = 10 + 10Q. At Q = 10, MC = 10 + 10(10) = 110.

Shag Express,a Retailer of Lamps,has Determined That Its Total Cost