If the interest rate is 10 percent, the present value of $400 to be received one year from today is about

A monopolist has total cost TC = Q2 + 10Q + 100 and marginal cost MC = 2Q + 10 . It faces demand Q = 130- P (so its marginal revenue is MR = 130 - 2Q). Its profit-maximizing output

a. 30 b. 25 c. 20 d. 10

Only about one-fourth of the federal budget involves expenditure categories determined by existing obligations and laws

a. True b. False Indicate whether the statement is true or false