When the Fed pursues a monetary policy of low interest rates, the exchange rate between the dollar and other currencies will tend to ________, generally making it ________ for foreign firms to sell their goods in the United States

In an effort to clean up the amount of sulfates introduced into the atmosphere the government has ruled that all polluters install smoke stack scrubbers on their smoke stacks and mandated a pollution limit on the amount of sulfates per parts of air

that may be legally emitted into the atmosphere. Suppose some of the polluters have found a more efficient way to eliminate the pollution. How will this discovery change the amount of sulfates emitted into the atmosphere?

In the case of pure monopoly:

a. one firm is the sole producer of a good or service which has no close substitutes b. the firm's profit is maximized at the price and output combination where marginal cost equals marginal revenue c. the demand curve is always elastic d. a and b only e. a, b, and c