As of October 2012, approximately what portion of U.S. currency is held outside of the United States?

A decrease in demand and an increase in supply results in a(n)

a. decrease in equilibrium price and an ambiguous effect on equilibrium quantity b. increase in equilibrium price and an ambiguous effect on equilibrium quantity c. ambiguous effect on equilibrium price and an increase in equilibrium quantity d. ambiguous effect on equilibrium price and an decrease in equilibrium quantity e. increase in equilibrium price and a decrease in equilibrium quantity

The invention of machinery that can double the amount of gold extracted from raw ore will likely lead mining companies to

a. raise the world price of gold to pay for the new machinery. b. lower the world price of gold because any amount can now be produced more cheaply. c. raise the world price of gold because miners' wages must double as their productivity doubles. d. lower the world price of gold only if new mining companies are not allowed to enter the industry.