# Topic 3 Exercise Answer - Topic 3 Elasticity Exercise 1...

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Topic 3 Elasticity Exercise 1. Rain spoils the strawberry crop, the price rises from \$4 to \$6 a box, and the quantity demanded decreases from 1,000 to 600 boxes a week. a. Calculate the price elasticity of demand over this price range. Answer: The price elasticity of demand is 1.25. The price elasticity of demand equals the percentage change in the quantity demanded divided by the percentage change in the price. The price rises from \$4 to \$6 a box, a rise of \$2 a box. The average price is \$5 a box. So the percentage change in the price is \$2 divided by \$5 and then multiplied by 100, which equals 40 percent. The quantity decreases from 1,000 to 600 boxes, a decrease of 400 boxes. The average quantity is 800 boxes. So the percentage change in quantity is 400 divided by 800, which equals 50 percent. The price elasticity of demand for strawberries is 50 percent divided by 40 percent, which equals 1.25. b. Describe the demand for strawberries. Answer: The price elasticity of demand exceeds 1, so the demand for strawberries is elastic. 2. If the quantity of dental services demanded increases by 10 percent when the price of dental services falls by 10 percent, is the demand for dental services inelastic, elastic, or unit elastic?

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