The fact that the production function relating output to labor becomes flatter as we move from left to right means that
A) the marginal product of labor is positive.
B) the marginal product of capital is positive.
C) there is diminishing marginal productivity of labor.
D) there is diminishing marginal productivity of capital.
C
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A good deal of iron ore is mined in Michigan's Upper Peninsula. What is the relationship between the demand for iron ore and the cost of mining operations in Michigan?
A) Changes in the demand for iron ore are caused directly by changes in the cost of iron mining. B) Changes in the costs of iron mining are caused by changes in the demand for iron ore. C) There is no significant relationship because the demand for iron ore is determined by many different people, while the cost of mining the ore is determined by business executives. D) Nobody knows.
Within the range of prices around the midpoint on a straight-line demand curve, demand is
A) elastic. B) inelastic. C) unit-elastic. D) zero.