"Lots of Hair" is a new local hair salon. It costs "Lots of Hair" $300 per day to open the store and $1000 of fixed costs to own the store each month. If "Lots of Hair" has a revenue function of R(x) = 20x² + 400 where x is the number of days after opening, find the instantaneous rate of change of PROFIT when x = 20.

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...
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"Lots of Hair" is a new local hair salon. It costs "Lots of Hair" $300 per day to open
the store and $1000 of fixed costs to own the store each month. If "Lots of Hair" has a
revenue function of R(x) = 20x² + 400 where x is the number of days after opening, find
the instantaneous rate of change of PROFIT when x = 20.
Transcribed Image Text:"Lots of Hair" is a new local hair salon. It costs "Lots of Hair" $300 per day to open the store and $1000 of fixed costs to own the store each month. If "Lots of Hair" has a revenue function of R(x) = 20x² + 400 where x is the number of days after opening, find the instantaneous rate of change of PROFIT when x = 20.
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