A monopolist has set her level of output to maximize profit. The firm's marginal revenue is $20, and the price elasticity of demand is -2.0. The firm's profit maximizing price is approximately:

Samsung provides a warranty for all goods it manufactures to indicate that these goods are of high quality. This is an example of ________

A) hedging B) signaling C) internalizing an externality D) sniping

Suppose that due to a poor economy, 1 million workers lost their jobs, causing the unemployment rate to increase to 10%. After a few months of searching, 300,000 of these unemployed workers give up looking for work. How would the decision by these 300,000 people affect the unemployment rate, all else equal?

A) The unemployment rate would remain unchanged. B) There is not enough information to answer this question. C) The unemployment rate would increase. D) The unemployment rate would decrease.