Albert and Betty hire Christine and David to play music at their wedding. Elizabeth, who lives behind the church, cannot study because of the loud music. The third party is

Suppose Bill Gates deposits $20 million into his checking account at Wells Fargo Bank. If the required reserve ratio is 10 percent, what is the maximum change in money supply?

A) -$200 million B) -$180 million C) $2 million D) $180 million E) $200 million

Which of the following is not a barrier to entry which leads to monopoly power

a. economies of scale b. control over key patents c. control of an essential resource d. government-imposed barriers to entry e. homogeneous product