The figure above shows a monopoly's total revenue and total cost curves. The monopoly's marginal revenue equals its marginal cost when it produces

The cost of adding a third worker to a shift in a manufacturing plant is less than the current average cost of adding workers. If the third worker is added, the average cost for the manufacturing plant ______.

a. will rise b. will fall c. will remain unchanged d. cannot be known

If a production possibility frontier is a straight line, it tells us that the opportunity cost of producing one more unit of good X is:

A) an increasing amount of good Y. B) a decreasing amount of good Y. C) equal to the inverse of the amount of good Y. D) a constant amount of good Y