When 4 units of labor are employed, total product is 6 units; when 5 units of labor are employed, total product is 9 units of output. If the price of output is $5 per unit, what is the marginal revenue product of the 5th unit of labor?

In August of 2013, the number of employed persons in the United States was 144.2 million, the number of unemployed persons was 11.3 million, and the number of persons not in the labor force was 90.5 million

What was the working-age population in August of 2013? A) 155.5 million B) 246.0 million C) 234.7 million D) 101.8 million E) There is not enough information to answer this question.

A firm will continue to produce in the short run even though economic profits are negative as long as

A) the amount of the loss is no greater than the amount of fixed cost. B) MC = MR. C) it earned positive economic profits last year. D) it has fixed obligations to pay.