A firm's average cost increases as it increases its output by expanding its plant and hiring additional workers (its only inputs to production). The firm's owner blames the increase in per-unit costs on the law of diminishing marginal productivity. The owner's reasoning is: A. correct because some inputs are fixed in the long run. B. incorrect because economies of scale are present. C. correct because marginal productivity must decrease in the short run. D. incorrect because all inputs are varied in the example.

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Which of the following describes one of the ways that the demographics of an area affect the price of housing in that area? a. when more people have children, their incomes tend to be higher and the housing prices are also higher. b. older people are more likely to stay in their houses, creating a seller's market that keeps prices low. c. an area with a lower population density won't have enough construction workers to build new houses quickly. d. an area with younger people will have a higher demand for rentals and a lower demand for buying.

In financial language, a "quarter" is one quarter of a year, or three months. your annual sales are $123,000. the sales are spread evenly over four quarters except that sales in the last quarter are double any other quarter because of the holidays. what are your sales in the first quarter of the year?