On the graph above, what is the profit-maximizing level of output for a pure monopolist?

Firms in a perfectly competitive market usually enter or leave an industry in the short-run and not in the long-run

Indicate whether the statement is true or false

The currency of the United States is

a. backed dollar for dollar by gold b. backed dollar for dollar by GDP (that is, by goods) c. not backed by anything (neither gold nor fool's gold) d. backed by the government's currency reserves in the vaults at Fort Knox e. backed by gold only for coin, not for paper bills