Refer to the information provided in Figure 7.10 below to answer the question(s) that follow. 
Figure 7.10Refer to Figure 7.10. The firm's level of total cost is represented by the given isocost line. At the optimal combination of capital and labor, the firm produces ________ units of output.
A. 100.
B. 200.
C. 300.
D. indeterminate from this information.
Answer: B
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Following the 2007-2009 financial crisis, many people feared that Greece might leave the euro and resume using the drachma. If that happened, the drachma might be worth less than the euro
When using fiat money like the drachma, the key to acceptance is that households and firms have confidence that if they accept drachma in exchange for goods and services, the drachma will not lose much value during the time they hold them. If sellers were not willing to accept the drachma in exchange for goods and services, the drachma would not serve as A) a medium of exchange. B) fiat money. C) legal tender. D) a unit of account.
The demand for gold increases, other things equal, when
A) the market for silver becomes more liquid. B) interest rates are expected to rise. C) interest rates are expected to fall. D) real estate prices are expected to increase.
The two basic ways to define money are
A) the transactions approach and the fiduciary approach. B) the transactions approach and the M1 approach. C) the transactions approach and the liquidity approach. D) the liquidity approach and the store of value approach.
If you kept your money under your mattress rather than keeping it in a savings account at your local bank,
A. you would not incur an opportunity cost. B. the opportunity cost of such an action would be the forgone interest of not putting the money in a savings account. C. the opportunity cost of such an action would be the gas money it took to drive to the bank. D. None of the choices are true.