Major contributors to pollution are

When deciding whether to buy a second car, the economic way of thinking indicates that the purchaser should compare

a. the benefits expected from two cars with the cost of both. b. the additional benefits expected from a second car with the cost of the two cars. c. the dollar cost of the two cars with the potential income that the cars will generate. d. the additional benefits of the second car with the additional cost of the second car.

If the quantity demanded of a product rose from 900 to 1,200 when the price of the product fell from $11 to $9, the price elasticity of demand coefficient is equal to

a. -0.20. b. -0.70. c. -1.00. d. -1.42.