29) The table shows quantity and cost of production of a particular commodity. What is the marginal cost of unit (quantity) 10? a) 13 b) 3.5 c) 6.45 d) 3 30) a drop in the price of tires shifts the demand curve for cars outward. Thus these two goods must be a) High demand goods b) Substitutes c) Complements d) Inferior goods 32) which of the following is not a reason to explain why people save money a) To leave an inheritance b) For retirement c) As a protection against setbacks in life (:1) People are not motivated