If the credits for a principles of economics section is three units and an instructor teaches two sections with 100 students in each and tuition and fees at your school are $500 per credit hour, then the marginal revenue product for your school from hiring that instructor that semester is:

Suppose that a monopolistically competitive firm is in long-run equilibrium. The firm's demand curve is tangent to its average cost curve at Q = 25 . Average cost is minimized at Q = 35, where average cost is $50 . Which of the following is true?

a. This firm charges $50 for the good. b. This firm charges more than $50 for the good. c. This firm charges less than $50 for the good. d. The firm has excess capacity at all output levels greater than 35 units. e. Average cost is $50 at the profit-maximizing output level.

Which of the following groups has experienced the greatest decrease in poverty rates since 1959?

a. the elderly b. children c. people 18 to 64 years old d. women e. none of the above (i.e., all of these groups have had higher poverty rates)