The demand function for a product is p = 105 − 0.2x where p is the price per unit (in dollars) and x is the number of units.   (a) Use differentials to approximate the change in revenue (in dollars) as sales increase from 20 units to 21 units. Compare this with the actual change in revenue (in dollars). dR=    ΔR=   (b) Repeat part (a) when sales increase from 40 units to 41 units. dR=   ΔR=

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
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Chapter3: Linear And Nonlinear Functions
Section: Chapter Questions
Problem 26MCQ
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The demand function for a product is
p = 105 − 0.2x
where p is the price per unit (in dollars) and x is the number of units.
 
(a)
Use differentials to approximate the change in revenue (in dollars) as sales increase from 20 units to 21 units. Compare this with the actual change in revenue (in dollars).
dR=
 
 ΔR=
 
(b)
Repeat part (a) when sales increase from 40 units to 41 units.
dR=
 
ΔR
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