A student is studying for an exam 2 hours a day and is debating whether to study an extra hour. The student's marginal benefit
A) depends on the grade the student earns on the exam.
B) is the benefit the student receives from studying all 3 hours.
C) is the benefit the student receives from studying the extra hour.
D) is greater than the student's marginal cost.
C
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Approximately how much of aggregate national income in the United States is spent on health care today?
A) 2 percent B) 7 percent C) 17 percent D) 34 percent
If the MPC is 0.75, then the MPS is
A. 1.25. B. 0.25. C. 1.39. D. cannot be determined without more information.
Refer to the information provided in Figure 11.1 below to answer the question(s) that follow. 
Figure 11.1 Refer to Figure 11.1. If the market rate of interest is < 5%, this firm's investment will total
A. $0. B. < $5,000. C. $7,000. D. > $15,000.
The aggregate supply curve in the classical model is
A) horizontal. B) vertical. C) upward sloping. D) downward sloping.