Suppose the accompanying figure illustrates the demand curve facing a monopolist. At a price of $8 per unit, the total revenue for this monopolist is ________ per day, and the marginal revenue earned from the last unit sold is ________.

In a production possibilities frontier diagram, the attainable production points are shown as

A) the points inside and the points on the production possibilities frontier. B) only the points inside the production possibilities frontier. C) any of the production points. D) only the points beyond the production possibilities frontier. E) only the points on the production possibilities frontier.

If the equation of exchange holds, and if the velocity of money and total output are fixed, then, if the money supply doubles,

A) the price level will increase by half. B) the price level will decrease by half. C) the price level will double. D) the price level will decrease by 25 percent.