A tariff is a limitation on the amount of a good that can be imported

A firm's total cost of production

a. always increases as it produces more output b. can increase or decrease as it produces more output c. increases at a decreasing rate as long as it produces more output d. is fixed in the short run, because inputs are fixed in the short run e. can be minimized by producing where the firm's demand curve crosses the horizontal axis

A health care program administered through Social Security that is applicable to everyone over 65 years old is

a. Medicaid b. Medicare c. federal HMO d. state HMO e. Medicinsurance