Refer to the scenario above. If Maria's opportunity cost of time increases to $80 per hour, the cost of driving to destination A is:

Over the course of the twentieth century there has been no pronounced tendency for concentration in the United States to increase

a. True b. False Indicate whether the statement is true or false

Which of the following is true under monopoly?

A. P = MR. B. P > MC. C. Profits are always positive. D. All of the choices are true for monopoly.