A cartel most likely forms in
A) an oligopolistic market.
B) a perfectly competitive market.
C) a monopolistically competitive market.
D) a heavily regulated industry.
A
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Based on the figure, the economy is initially in long-run equilibrium at point A. If there is a favorable supply shock that increases potential output and shifts the long-run aggregate supply curve from LRAS to LRAS', then the new long-run equilibrium is reached at point: 
A. B B. D C. E D. C
If the HHI for an industry equals 3,200,
A) firms in the industry are most likely to make zero economic profit B) the industry is probably an oligopoly C) firms in the industry are likely to act independently of each other D) firms in the industry must enter a cartel in order to earn an economic profit E) the industry is almost surely monopolistic competition
If the exchange rate of the English pound goes from $1.50 to $2.00, the pound has
a. appreciated, and the English will find U.S. goods cheaper. b. appreciated, and the English will find U.S. goods more expensive. c. depreciated, and the English will find U.S. goods cheaper. d. depreciated, and the English will find U.S. goods more expensive.
If a bank customer deposits $100 in cash, and the bank lends $90 of that deposit to another customer by crediting $90 to her account:
A. the money supply has increased by $190. B. the money supply has increased by $90. C. the money supply has decreased by $10. D. the money supply has not changed.