Dennis notices that jackets are on sale for $99. In this case money is functioning as a

When technology improves in a country with a fast-growing population ________

A) output rises, but output per person does not B) output rises in that country, while output per person rises in other countries C) output per person rises in that country and around the world D) output per person rises temporarily, then declines

Ten cases of spring water are sold for $6 each, and the marginal product of the last unit of labor is 5 . If the price of a case increases from $6 to $8, then the marginal revenue product of the last unit of labor would

a. decrease by $10 b. increase by $40 c. decrease by $30 d. increase by $10 e. not change