The exchange rate is determined by the interaction of the supply and demand for currencies in which exchange rate system? is:

Refer to the table above. What is the marginal product of the third worker?

A) 60 pairs of shoes B) 68 pairs of shoes C) 112 pairs of shoes D) 180 pairs of shoes

Firms that survive in the long run are usually those that

A) become as large as possible. B) remain small. C) use more capital rather than more labor. D) earn the largest possible profit.