________ regularly trade their own gain against others' lives

Specialization and division of labor are made easier by the existence of money

a. True b. False Indicate whether the statement is true or false

Let L represent the number of workers hired by a firm, and let Q represent that firm's quantity of output. Assume two points on the firm's production function are (L = 12, Q = 122) and (L = 13, Q = 130). Then the marginal product of the 13th worker is

a. 8 units of output. b. 10 units of output. c. 122 units of output. d. 132 units of output.