Refer to the graph shown.As a result of a tariff T imposed on speedboats, the price domestic consumers pay for speedboats probably will likely be:

The money demand curve has a

A) negative slope because an increase in the interest rate decreases the quantity of money demanded. B) positive slope because an increase in the interest rate increases the quantity of money demanded. C) negative slope because an increase in the price level decreases the quantity of money demanded. D) positive slope because an increase in the price level increases the quantity of money demanded.

For a firm in a perfectly competitive industry,

A) both short-run and long-run economic profits may be negative.
B) short-run economic profits must be zero.
C) short-run economic profits may be positive, but long-run economic profits must be zero.
D) short-run and long-run economic profits must be zero.