To increase the mean of 4 numbers by 2, by how much would the sum of the 4 numbers have to
A.2
B.4
C.6
D.8
E.16
A.2
B.4
C.6
D.8
E.16
A、A, B, C.
B、B, C, A.
C、B, A, C.
D、C, A, B.
E、none of the above.
Home’s demand curve for wheat is D = 100 - 20P. Its supply curve is S = 20 + 20P. Now add Foreign, which has a demand curve D* = 80 - 20P and a supply curve S* = 40 + 20P. Home imposes a specific tariff of 0.5 on wheat imports. a.Determine the effect of the tariff on the welfare of each of the following groups: (1) Home import-competing producers; (2) Home consumers; (3) the Home government. b. Show graphically and calculate the terms of trade gain, the efficiency loss, and the total effect on welfare of the tariff.
A plastics monopolist faces the demand curve P=180 - Q, where Q is measured in thousands of pounds per year and P is measured in dollars per pound. Marginal cost is constant at MC=$60 per pound.
(a)Find the monopolist's profit-maximizing price and quantity.
(b)What is the elasticity of demand at the profit-maximizing price?
A、increases; decreases
B、decreases; increases
C、Both a. and b.
D、None of the above.
A、tend to purchase more of a good as its price rises.
B、purchase name brand products more frequently than generic products.
C、tend to purchase more of a good as its price falls.
D、purchase more of a good as their incomes rise.
A、lackage of elasticity
B、elastic
C、unelatic
D、powerfully elastic
A、How to make economic policies
B、How to maxmize the profit
C、How societies use scarce resources
D、How to maxmize comsumer wealth
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