Refer to the accompanying table. Martha's opportunity cost of making of a pie is: Time to Make a PieTime to Make a CakeMartha60 minutes80 minutesJulia50 minutes60 minutes
A. 80 cakes.
B. 4/3 of a cake.
C. 8 cakes.
D. 3/4 of a cake.
Answer: D
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Suppose a monopolist faces the demand curve shown below. 
The monopolist maximizes its profits by:
A. producing 35 units, since this is where total revenue is maximized. B. charging $70 for each unit. C. producing the level of output at which marginal revenue equals marginal cost. D. producing the level of output at which marginal revenue minus marginal cost is greatest.
Marxism's ultimate goal is for ____________ ____________
Fill in the blank(s) with the appropriate word(s).
In the ________ increases in the supply of money will ________
A) long run; lead to lower prices B) short run; raise total demand and output C) long run; raise total demand and output D) short run; decrease total demand and output
Which of the following is an example of a natural monopoly?
A) the Pittsburgh Penguins hockey team, a National Hockey League team B) Ford Motors, the large automobile producing company C) Florida Power and Light, an electric utility in Florida D) Sony, the Japanese producer of the Playstation III E) JCPenney, the large department store chain