In the United States, spending on Social Security, Medicare, and Medicaid was approximately ________ of GDP in 1962, and is expected to be approximately ________ of GDP in 2050

The above figure shows four different markets with changes in either the supply curve or the demand curve. Which graph best illustrates the market for computers after technological advances in making computers occur?

A) Graph A B) Graph B C) Graph C D) Graph D

If a firm makes zero economic profit, then the firm

A) has no incentive to stay in the industry. B) is better of exiting the industry. C) is indifferent between staying and exiting the industry. D) will shut down.