Mathematically the marginal rate of substitution is

A. always a positive number.
B. is equal to 1.
C. sometimes a positive and sometimes a negative number.
D. always a negative number.


Answer: D

Economics

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If the price of inputs rises and consumer expectations about future economic activity worsens:

a. Price index rises, and real GDP rises. b. Price index rises, and real GDP falls. c. Price index rises, and the change in real GDP is uncertain. d. Price index falls, and real GDP rises. e. The change in price index is uncertain, and real GDP falls.

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Which U.S. industry appears to be the most oligopolist?



a. search engines
b. tire manufacturing
c. wireless telecommunications carriers
d. major household appliance manufacturing

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Based on the pie chart showing federal government revenue, the two sources that combine to provide roughly 80% of federal revenue are ______.


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