Among the very rich, the main source of income is most likely their wages

The marginal factor cost is the

A) additional revenue obtained from a one-unit change in labor input. B) additional revenue obtained from a one-unit change in output. C) change in output resulting from the addition of one more worker. D) cost of using an additional unit of an input.

During which one of the following decades was the goal of 4 percent unemployment set as an acceptable compromise between our full employment and inflation goals?

A. 1990s. B. 1970s. C. 1980s. D. 1960s.