Question: The demand for a certain commodity is D(x) =500e -0.2x units per month when the market price is x dollars per unit. (a) At what
The demand for a certain commodity is
D(x) =500e-0.2x
units per month when the market price is x dollars per unit.
(a) At what rate is the consumer expenditure E(x) = xD(x) changing with respect to price x when the price is equal to $60 dollars?
(b) At what price does consumer expenditure stop increasing and begin to decrease?
(c) At what price does the rate of consumer expenditure begin to increase?
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