The rate of interest that equates saving and investment at full employment is called the

If the marginal benefit of the next slice of pizza exceeds the marginal cost, you will

A) eat the slice of pizza. B) not eat the slice of pizza. C) be unable to choose between eating or not eating. D) eat half the slice. E) More information is needed about how much the marginal benefit exceeds the marginal cost to determine if you will or will not eat the slice.

In a graph that illustrates a perfectly competitive firm, marginal revenue is

A) a diagonal line that lies below the firm's demand curve. B) a line that intersects the firm's demand curve from below at its lowest point. C) the same as the firm's demand curve. D) a line that intersects the firm's average total cost curve from below at its lowest point.