Suppose that the dollar cost of producing x appliances is c(x) = 1200+130x-0.4x². a. Find the average cost per appliance of producing the first 150 appliances. b. Find the marginal cost when 150 appliances are produced. c. Show that the marginal cost when 150 appliances are produced is approximately the cost of producing one more appliance after the first 150 have been made by calculating the latter cost directly

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