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      Question

      In the short run, if a firm’s production function is Q

      = K^0.5 * L^0.5 and Capital (K) is fixed at 100 units, the Short-Run Marginal Cost (SRMC) curve will be:
      A Horizontal Correct Answer Incorrect Answer
      B Downward sloping Correct Answer Incorrect Answer
      C Upward sloping Correct Answer Incorrect Answer
      D U-shaped Correct Answer Incorrect Answer

      Solution

      With K fixed, the function becomes Q = 10 * L^0.5. To increase output, the firm faces diminishing marginal productivity of labor. As MPL declines, the cost of producing an additional unit (MC = w / MPL) must rise, leading to an upward-sloping MC curve.

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