The riskiness of an asset's returns due to changes in interest rates is

When _____, we are at the optimal amount of pollution

a. pollution is at zero b. pollution is equal to the amount produced in an unregulated market c. the total cost of pollution is equal to the total cost of pollution abatement d. the marginal cost of pollution is equal to the marginal cost of pollution abatement

Which of the following statements is correct regarding the Fed? a. Under the Federal Reserve System, there is one Federal Reserve Bank, located in Washington D.C

b. Under the Federal Reserve System, there is one Federal Reserve Bank whose location changes every 14 years. c. Under the Federal Reserve System, there is a Federal Reserve Bank in each Congressional district. d. Under the Federal Reserve System, there is a Federal Reserve Bank in each state. e. Under the Federal Reserve System, there are 12 Federal Reserve banks, one in each of the 12 Federal Reserve districts.