QUESTION 12 Marginal utility is derived by dividing total utility by the quantity of the good that is consumed. O True O False QUESTION 13 The idea of utility is one of the explanations for the downward sloping demand curve. O True O False QUESTION 14 Marginal cost is derived by dividing the change in total cost by the quantity. O True False QUESTION 15 The income effect of a price change occur purchasing power. as a result of a change in O True O False QUESTION 16 The short run average total cost is always less than the average fixed cost True O False QUESTION 17 Diseconomies of scale is another name for constant returns to scale. O True False QUESTION 18 Economies of scale is a situation which the long run average total cost declines with an increase in output. True False