The consumer demand equation for tissues is given byq= (90p)²,

wherepis the price per case of tissues andqis the demand in weekly sales.

(a) Determine the price elasticity of demandEwhen the price is set at $31. (Round your answer to three decimal places.)

E=

Interpret your answer.

The demand is going?

1. up

1. down

by-------------% per 1% increase in price at that price level.

(b) At what price should tissues be sold to maximize the revenue? (Round your answer to the nearest cent.)

$

(c) Approximately how many cases of tissues would be demanded at that price? (Round your answer to the nearest whole number.)

cases per week