Which of the following most accurately reflects the pattern of changes in the earth's temperature?
a. The earth's temperature has risen by approximately 3 degrees Fahrenheit during the past century and most of the increase has occurred since 2000.
b. The earth's temperature has fallen by approximately 1.4 degrees Fahrenheit during the past century.
c. The earth's temperature rose during the last third of the 20th century, but there was little temperature change between 1998 and 2013.
d. There has been virtually no change in the earth's temperature for at least the past 1000 years.
C
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In Figure 45.5, where one union is bargaining against one employer, the lowest possible negotiated wage paid to workers will be 
Figure 45.5
A. W1. B. W*. C. W2. D. an undetermined point between W1 and W2.
The candy store represented in the figure to the right is currently selling Qa units of candy at a price of Pa. Is this candy store maximizing its profit and if it is? not, what would you recommend to the? firm?
A) Yes, it is maximizing its profit by charging the highest price possible.
B) No, it is not; since its marginal cost is constant, it should produce and sell as much candy as it can. It should sell Qd units at a price of Pd.
C) No, it is not; it should lower its price to Pc and sell Qc units.
D) No, it is not; it should lower its price to Pb and sell Qb units.
Which of the following trade agreements provides for the development of a single market among its members?
A) World Trade Organization B) European Union C) North American Free Trade Agreement D) Asian Pacific Economic Cooperation
Markets can be missing if:
A. there is a lack of technology that would make the exchanges possible. B. there is a ban on the sale of a particular good. C. there is a lack of accurate information between potential buyers and sellers. D. All of these are true.