6) If the marginal tax rate is 20 percent, by how much must income have increased if
your tax bill increases by $300?
A.$300
B.$1,000
C.$1,500
D.Cannot be determined
7) Answer the question on the basis of the following information. Assume that if the
interest rate that businesses must pay to borrow funds were 20 percent, it would be
unprofitable for businesses to invest in new machinery and equipment, so investment
would be zero. But if the interest rate were 16 percent, businesses would find it
profitable to invest $10 billion. If the interest rate were 12 percent, $20 billion would be
invested. Assume that total investment continues to increase by $10 billion for each
successive 4 percentage point decline in the interest rate.
Refer to the information. Using i and I to indicate the interest rate and investment (in
billions of dollars) respectively, which of the following is the correct tabular
presentation of the described relationship?
A.Option A
B.Option B
C.Option C
D.Option D
8) Homogeneous oligopoly exists where a small number of firms are:
A.producing virtually identical products.
B.setting price and output independently.
C.setting price and output collusively.
D.producing differentiated products.
9) “Backflows” occur when:
A.two countries send immigrants to each other in approximately equal numbers.