Suppose TC = 10 + (0.1 ? q2). If p = 10, the firm's profit-maximizing level of output is

If the supply of a factor is perfectly inelastic, then

A) no more than the existing quantity can be supplied. B) the supply curve is horizontal. C) sellers will provide whatever quantity is demanded at the going price. D) a fall in price results in no quantity being supplied.

Which of the following would have the greatest positive impact on a country's domestic economy?

A) An increase in spending on imports from other countries. B) An increase in spending by foreigners on the country's exports. C) A decrease in the confidence of foreign investors in the country's economy. D) A decrease in the incomes of consumers in foreign countries.