Pat can either drive to work, which takes half an hour and uses $1.50 worth of gas, or take the bus, which takes an hour and costs $1.00. How should Pat get to work?
A. Pat should always take the bus because it costs $0.50 less.
B. Pat should always drive because it saves half an hour.
C. Pat should drive if saving a half hour is worth $0.50 or more.
D. Pat should take the bus if a half hour of time is worth $0.50 or more.
查看答案
Amy is thinking about going to the movies tonight. A ticket costs $7 and she will have to cancel her dog-sitting job that pays $30. The cost of seeing the movie is ( ).
A. $7.
B. $30.
C. $37.
D. $37 minus the benefit of seeing the movie.
A firm that is the sole seller of a product without close substitutes is ( ).
A. perfectly competitive.
B. monopolistically competitive.
C. an oligopolist.
D. a monopolist.
When firms are said to be price takers, it implies that if a firm raises its price, ( ).
A. buyers will go elsewhere.
B. buyers will pay the higher price in the short run.
C. competitors will also raise their prices.
D. firms in the industry will exercise market power.
Which of the following costs do not vary with the amount of output a firm produces?
Average fixed costs.
B. Fixed costs and average fixed costs.
C. Marginal costs and average fixed costs.
D. Fixed costs.
微信支付 
支付宝支付