Hedge funds often buy the same stocks and track each other's investment strategies. This is an example of ________

Moving along the production possibilities frontier itself illustrates

A) the existence of tradeoffs. B) the existence of unemployment of some factors of production. C) the benefits of free lunches. D) how free lunches can be exploited through trade. E) how tradeoffs need not occur if the economy is efficient.

Sarah is able to take out a loan for $5000 for one year at an annual interest rate of 10 percent. After calculating her return to be $450, Sarah will:

A. make $50 on net, and should take out the loan. B. lose $50 on net, and should not take out the loan. C. lose $450 on net, and should not take out the loan. D. make $450 on net, and should take out the loan.