Table 30.1Number of workers (per hour)Total output (per hour)Marginal physical product (output per worker)Total revenue (dollars per hour)Marginal revenue product (dollars per hour worker)14---________---210________________________315________________________419________________________522________________________Assume that the product price is $4 per unit and that the hourly wage for workers is $12. Neither price nor wage changes with output. In Table 30.1, how many workers should be hired?

A. 3.
B. 2.
C. 4.
D. 5.

Answer: D

Economics

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