chpt 4 question 2

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the demand function for a cola-type soft drink in general is q=20 - 2p, where q stands for quantity and p stands for price.

a) calculate point elasticities at prices of 5 and 9. is the demand curve elastic or inelastic at these points?

b) calculate arc elasticity at the intervals between p=5 and p=6.

c) at which price would a change in price and quantity result in approximately no change in total revnue? why?
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