Refer to the information provided in Figure 13.9 below to answer the question(s) that follow. 
Figure 13.9 Refer to Figure 13.9. From society's point of view, the efficient level of electricity production is ________ megawatts.
A. 500
B. 600
C. 800
D. 1200
Answer: C
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A machinery used in a factory is a(n) ________ good
A) club B) capital C) inferior D) public
Last year, Joan bought 50 pounds of hamburger when her household income was $40,000. This year, her household income was only $30,000 and Joan bought 60 pounds of hamburger
Holding everything else constant, Joan's income elasticity of demand for hamburger is A) negative, so Joan considers hamburger to be an inferior good. B) negative, so Joan considers hamburger to be a normal good. C) positive, so Joan considers hamburger to be an inferior good. D) positive, so Joan considers hamburger to be a normal good and a necessity.
Jeanie Reuter and Ruth Oslen are tenants in first and second floor apartments. Jeanie practices her piano lessons in the morning, while Ruth practices aerobics on drum beats at the same time. Further assume that the value of the practice to Jeanie is $10 while the value of aerobic exercises to Ruth is $6 . Which of the following is a feasible solution to the problem if the cost of negotiation is
zero? a. Ruth will pay Jeanie $6 to make her change the time for piano practice. b. Ruth will pay Jeanie $10 to make her change the time for piano practice. c. Jeanie will pay Ruth $4 to make her change the time for aerobics exercises. d. Jeanie will pay Ruth $6 to make her change the time for aerobics exercises.
The average level of tariffs on imported products charged by industrialized countries changed between 1946 and 1990
a. from 5 percent to 40 percent. b. from 40 percent to 5 percent. c. from 10 percent to 20 percent. d. from 20 percent to 10 percent.