The table above shows the marginal costs and marginal benefits of college education. If 20 million students are enrolled, the marginal external benefit is

The Widget Company has estimated the following revenue possibilities for the year:

Sales Probability 100 0.15 150 0.20 220 0.30 290 0.20 310 0.15 a. Find expected revenue. b. Find the standard deviation. c. Find the coefficient of variation.

The discovery of new natural resources will cause

A) the economy to move closer to the production possibilities curve. B) the production possibilities curve to shift up and to the right. C) an upward movement along the curve. D) the curve to shift back and to the left.