Refer to the information provided in Figure 13.3 below to answer the question(s) that follow. 
Figure 13.3Refer to Figure 13.3. The marginal revenue of the eighth pound of burritos is
A. $3.
B. $5.
C. $12.
D. $96.
Answer: B
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Which of the following implies that a model is an approximation?
A) The model is not based on any assumption. B) The predictions of the model are mostly wrong. C) The predictions of the model will hold in most cases but not all. D) The predictions of the model cannot be tested with data.
Under the gold standard, a nation with a balance of payments deficit would experience a gold:
A. inflow and an increase in its money supply. B. inflow and a reduction in its money supply. C. outflow and an increase in its money supply. D. outflow and a reduction in its money supply.
Recall the Application about food and drink pricing during "happy hour" at bars and restaurants to answer the following question(s).Recall the Application. During "happy hour," many bars and restaurants face an increase in demand for food and drink, and these establishments often cut prices during these times of increased demand. When this demand increases, the bars and restaurants face a ________ demand curve.
A. perfectly elastic B. perfectly inelastic C. more elastic D. more inelastic
If planned injections are less than leakages, output will
A. increase. B. remain constant. C. decrease. D. either increase or decrease.