The rate of growth of output per worker in the United States between 1985 and 2014 was approximately equal to which of the following?

Adriana wants to try working as an independent contractor this summer. She has a 50 percent chance that she will make $9,000 and 50 percent chance that she will make nothing. What's Adriana's expected income?

A) $4,000 B) $4,500 C) $2,000 D) $3,000

If a firm is forced to take external costs into account, it will

A) reduce production and charge a higher market price. B) increase production and charge a lower market price. C) reduce prices and hire more workers. D) reduce prices and hire fewer workers.