At a price of $5, 24 units of the good would be sold; at a price of $7, 25 units of output would be sold. The marginal revenue of the 25th unit of output is:

If automobiles and gasoline are complements, then their cross-elasticity coefficient will be:

a. strictly greater than one. b. positive. c. equal to zero. d. negative.

Growth in GDP per capita will be achieved when

A. The government allows tax credits for companies who invest in research and development. B. GDP grows faster than the population. C. Labor demand decreases substantially while labor supply increases slightly. D. Investment is equal to saving.