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The price elasticity of demand is equal to


A) The percentage change in quantity demanded times the percentage change in price.
B) The unit change in price divided by the unit change in quantity demanded.
C) The percentage change in quantity demanded divided by the percentage change in price.
D) The unit change in quantity demanded times the unit change in price.

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To find the average percentage change in price,


A) The change in price is divided by the average price.
B) The change in quantity is divided by the average quantity.
C) The change in quantity is divided by the change in price.
D) The percentage change in quantity demanded is divided by the percentage change in price.

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Price elasticity of demand refers to


A) How responsive producers are to a change in the cost of production.
B) How sensitive buyers are to a change in price.
C) How buyers respond to a change in income.
D) How buyers react to a change in the price of a substitute good.

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Elasticity of supply tells us


A) How much sellers will increase production in response to a change in price.
B) How much sellers will change their price as their quantity supplied changes.
C) How much producers will increase production with changes in consumers' income.
D) How much supply responds to a change in quantity demanded.

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A grocery store put salt on sale but found that total revenues fell. This can be explained by which of the following?


A) The demand for salt is very elastic.
B) The demand curve for salt is vertical.
C) The demand for salt is inelastic.
D) The demand for salt is unitary elastic.

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If the elasticity of demand for cigarettes is 0.4, a seller should


A) Increase price to increase total revenue.
B) Decrease price to increase total revenue.
C) Reduce price to maximize profits.
D) Increase price because the percentage change in quantity demanded will be greater than the price effect.

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If the elasticity of demand is 3, and the price rises by 15 percent, then


A) The quantity demanded will increase by 5 percent.
B) The quantity demanded will fall by 45 percent.
C) The quantity demanded will rise by 4.5 percent.
D) The percentage change in quantity demanded will fall as income rises.

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To increase U.S. energy independence, prices must be lowered on gasoline and electricity.

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The In The News article "Play Station 3 Sales More Than Double after Price Cut" indicated that


A) The percentage change in price was greater than the percentage change in quantity demanded.
B) The percentage change in quantity demanded was greater than the percentage change in price.
C) The demand for the Play Station 3 consoles was inelastic.
D) The percentage change in price was the same magnitude as the percentage change in quantity demanded.

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  Over the price range from $180 to $120 in Figure 20.1, ceteris paribus, A)  Demand is elastic. B)  Total revenue is maximized. C)  Demand is increasing. D)  Utility is maximized. Over the price range from $180 to $120 in Figure 20.1, ceteris paribus,


A) Demand is elastic.
B) Total revenue is maximized.
C) Demand is increasing.
D) Utility is maximized.

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The formula for the elasticity of supply is the percentage change in quantity supplied divided by the percentage change in price.

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If the price elasticity of demand is 1.0, and a firm raises its price by 10 percent, the total revenue will


A) Rise by 10 percent.
B) Fall by 10 percent.
C) Not change.
D) Rise by 100 percent.

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If income rises by 10 percent and the quantity sold of a particular vehicle falls by 7 percent, then this particular type of vehicle is


A) A normal good.
B) An inferior good.
C) An irregular good.
D) A substandard good.

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Price elasticity looks at


A) The law of demand.
B) How much quantity demanded changes after a change in price.
C) The degree to which price changes with a change in quantity demanded.
D) Why the law of demand is untrue.

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Ceteris paribus, the longer the time period, the


A) Smaller the income elasticity for the good.
B) Less elastic the demand for the good.
C) More unitary elastic the demand for the good.
D) More elastic the demand for the good.

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Most goods are normal goods, and their demand shifts to the left when income rises.

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Assume the price elasticity of demand for JT Chip Co. chips is 4.0. If the company decreases the price of each bag of chips from $1.89 to $1.49, the number of bags sold will


A) Decrease by 78 percent.
B) Increase by 95 percent.
C) Increase by 48 percent.
D) Increase by 78 percent.

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If the demand for cigarettes is inelastic,


A) Total revenue will rise if the price of cigarettes rises.
B) No matter how high the price goes, the quantity demanded will not fall.
C) Total revenue will fall if the price of cigarettes rises.
D) A price reduction will actually cause the quantity demanded to fall.

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Supply is very inelastic when


A) The quantity supplied changes little when the price increases.
B) The quantity supplied changes a lot when price increases.
C) The quantity supplied does not change at all when price increases.
D) The quantity supplied changes only when demand changes.

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Assume the price elasticity of demand for U.S. Frisbee Co. Frisbees is 0.5. If the company increases the price of each Frisbee from $12 to $16, the number of Frisbees demanded will


A) Decrease by 14.3 percent.
B) Decrease by 33.3 percent.
C) Increase by 20.0 percent.
D) Increase by 7.0 percent.

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