The demand function for a product is modeled by p = 400 − 4x,0 ≤ x ≤ 100, where p is the price per unit (in dollars) and x is the number of units.   (a)Determine when the demand is elastic and inelastic. (Enter your answer using interval notation. If an answer does not exist, enter DNE.)   elastic demand? inelastic demand?    (b)Determine when the demand is of unit elasticity. (Enter your answers as a comma-separated list.) x =     (c) Use the result of part (a) to describe the behavior of the revenue function. (Enter your answers as a comma-separated list, increase or decrease) The revenue function_____   , then is flat at x = _______ ,and then_____ .

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
Question
The demand function for a product is modeled by p = 400 − 4x,0 ≤ x ≤ 100,
where p is the price per unit (in dollars) and x is the number of units.
 
(a)Determine when the demand is elastic and inelastic. (Enter your answer using interval notation. If an answer does not exist, enter DNE.)
 
elastic demand?
inelastic demand?
 
 (b)Determine when the demand is of unit elasticity. (Enter your answers as a comma-separated list.)
x = 
 
 (c) Use the result of part (a) to describe the behavior of the revenue function. (Enter your answers as a comma-separated list, increase or decrease)
The revenue function_____   , then is flat at x = _______ ,and then_____ .
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