Wendell can sell five motor homes per week at a price of $22,000. If he lowers the price of motor homes to $20,000 per week he will sell six motor homes. What is the marginal revenue of the sixth motor home?

If, between 2006 and 2016, the economy's real GDP grew from $20 billion to $40 billion, what was the average annual growth rate in the economy?

A) 3% B) 7% C) 20% D) 100%

The advantage of a system of fixed exchange rates over one where exchange rates are flexible is that

a. the government gains more control over the economy. b. floating exchange rates impose risks on importers and exporters from unpredictable exchange rates. c. exchange controls become unnecessary. d. fiscal and monetary policy can focus more on domestic conditions.