If a restaurant runs a special and sells a lobster dinner for $4.50, Amy buys one lobster dinner a week. If lobster dinners are not on special and the price is $16.00, Amy buys zero lobster dinners per week. Which of the following is true?
A. Amy's marginal utility from a lobster dinner is greater than $16.00.
B. Amy's demand for lobster is inelastic.
C. Amy's marginal utility from a lobster dinner is less than $4.50.
D. The value of Amy's marginal utility from a lobster dinner is at least $4.50 and less than $16.00.
Answer: D
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a. Output rises, employment rises and unemployment falls. b. Output falls, employment falls and unemployment rises. c. Output rises, employment falls and unemployment falls. d. Output rises, employment rises and unemployment rises. e. Output rises, employment rises and tax revenues fall.
Use the following table to answer the question below: The amount of total output produced from various combinations of labor and capital. 
If the amount of capital increases from 3 to 4 units, the marginal product of the fourth unit of labor
A. decreases by 12 units. B. increases by 5 units. C. increases by 8 units. D. decreases by 3 units. E. none of the above
Suppose there are three power-generating plants, each of which has access to 5 different production processes. The table below summarizes the cost of each production process and the corresponding number of tons of smoke emitted each.ProcessABCDE(smoke/day)(4 tons/day)(3 tons/day)(2 tons/day)(1 tons/day)(0 tons/day)Cost to Firm X ($/day)$500$514$530$555$585Cost to Firm Y ($/day)$400$420$445$480$520Cost to Firm Z ($/day)$300$325$360$400$550 Suppose the government requires each firm to reduce pollution to 2 tons of smoke per day, so that total daily smoke emission is 6 tons. The total cost to society of this policy will be ________ per day.
A. $59 B. $135 C. $230 D. $42
If a positive relationship exists between x and y:
A. an increase in x will cause y to decrease. B. a decrease in x will cause y to increase. C. the relationship will graph as an upsloping line. D. the vertical intercept must be positive.