A car wash reduced the price of a basic wash as a promotion and test of the market. With the price at $8 the average monthly sales has been 29000. When the price dropped to $7, the average monthly sales rose to 35000. Assume that monthly sales is linearly related to the price. What car wash price would maximize revenue? $ Given the demand function D(p) = \\ 225 - 2p, Find the Elasticity of Demand at a price of $104 Given the demand function D(p) = 200 P Find the Elasticity of Demand at a price of $21