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      Question

      Given the Total Cost function TC = 100 + 10Q + 2Q

      squared, what is the Marginal Cost (MC) when output Q is 5?
      A 10 Correct Answer Incorrect Answer
      B 20 Correct Answer Incorrect Answer
      C 30 Correct Answer Incorrect Answer
      D 150 Correct Answer Incorrect Answer

      Solution

      MC is the derivative of TC with respect to Q. MC = 10 + 4Q. At Q = 5, MC = 10 + 4(5) = 10 + 20 = 30.

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