If the price elasticity of demand for gasoline is 0.8 and the price elasticity of demand for plane tickets is 2.2 then the demand for gasoline is ________ and the demand for plane tickets is ________

A perfectly competitive market is in long-run equilibrium. At present there are 100 identical firms each producing 5,000 units of output. The prevailing market price is $20. Assume that each firm faces increasing marginal cost. Now suppose there is a

sudden increase in demand for the industry's product which causes the price of the good to rise to $24. Which of the following describes the effect of this increase in demand on a typical firm in the industry? A) In the short run, the typical firm increases its output and makes an above normal profit. B) In the short run, the typical firm's output remains the same but because of the higher price, its profit increases. C) In the short run, the typical firm increases its output but its total cost also rises, resulting in no change in profit. D) In the short run, the typical firm increases its output but its total cost also rises. Hence, the effect on the firm's profit cannot be determined without more information.

Which of the following statements is true?

A. "Extreme poverty" refers to an income of less than $2 per day. B. U.S. GDP per capita is five times larger than the world average. C. The poorest nations of the world have average incomes of $5,000. D. According to world standards, 12 percent of Americans are poor.