Compute and interpret marginal average cost Question Given a cost function C(x) as C(x) = 20 + x - x calculate the marginal average cost when x = 2, use this to approximate the average cost when x = 3, and calculate the percentage error between this estimate and the actual cost when x = 3. Give your answer as a percentage to the nearest integer. Do not include the percent symbol in your answer. Provide your answer below