If the consumption function is C = 90 + 0.75y, then the marginal propensity to save is

In the United States, the use of CFCs in most aerosol sprays was banned in

a. 1987 c. 2005 b. 1978 d. 1970

In general, a firm will be likely to invest as long as the

A. firm doesn't have to borrow any money to make the investment. B. profits realized from the investment are sufficient to cover the interest payments. C. interest rate is less than the inflation rate. D. firm can sell bonds directly to the public instead of borrowing from a bank.