If a country begins to import more of a commodity, one can normally expect the price of the commodity to

In a prisoner's dilemma:

a. all competing parties gain. b. one competitor gains at the expense of another. c. all competing parties lose. d. one competitor loses.

The Roomba 570 is a robotic vacuum cleaner made and sold by iRobot. It can vacuum 4 rooms on a single battery charge and it costs $2 worth of electricity to charge the Roomba

Lynn is a house cleaner and can vacuum 4 rooms in 1 hour with a traditional vacuum. Suppose you want the 4 rooms in your house vacuumed once a week for one year. Ignoring the cost of any electricity Lynn uses, which method is economically efficient if Lynn charges $20 per hour? $30 per hour? A) Roomba if Lynn charges $20 per hour and Lynn if she charges $30 per hour B) Lynn if she charges $20 or $30 per hour C) Roomba if Lynn charges $20 or $30 per hour D) Lynn if she charges $20 per hour and Roomba if Lynn charges $30 per hour