An automobile company is ready to introduce a new line of cars through a national sales campaign. After t the line in a carefully selected city, the marketing research department estimates that the sales (in millions increase at the monthly rate of the following function for t months after the campaign has started. S'(t) = 18-13 e - 0.1t 0st≤21 ...
An automobile company is ready to introduce a new line of cars through a national sales campaign. After t the line in a carefully selected city, the marketing research department estimates that the sales (in millions increase at the monthly rate of the following function for t months after the campaign has started. S'(t) = 18-13 e - 0.1t 0st≤21 ...
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
An automobile company is ready to introduce a new line of cars through a national sales campaign. After test marketing the line in a carefully selected city, the marketing research department estimates that the sales (in millions of dollars) will increase at the monthly rate of the following function for t months after the campaign has started.
![An automobile company is ready to introduce a new line of cars through a national sales campaign. After test marketing
the line in a carefully selected city, the marketing research department estimates that the sales (in millions of dollars) will
increase at the monthly rate of the following function for t months after the campaign has started.
S'(t) = 18-13 e
- 0.1t
S(t)= 18t+ 130 e
(A) What will be the total sales, S(t), t months after the beginning of the national sales campaign if we assume no sales
at the beginning of the campaign?
0≤t≤21
-0.1t - 130
(B) What are the estimated total sales for the first 8 months of the campaign?
72 million
(Round to the nearest whole number.)
(C) When will the estimated total sales reach $100 million? Use a graphing calculator to approximate the solution to the
equation S(t) = 100.
t≈
(Round to two decimal places as needed.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F16afad9b-824d-42b7-9e40-175f68ea31da%2F12217fdc-a68d-4ac2-a75d-b93dcde9415e%2Fx29lyrp_processed.png&w=3840&q=75)
Transcribed Image Text:An automobile company is ready to introduce a new line of cars through a national sales campaign. After test marketing
the line in a carefully selected city, the marketing research department estimates that the sales (in millions of dollars) will
increase at the monthly rate of the following function for t months after the campaign has started.
S'(t) = 18-13 e
- 0.1t
S(t)= 18t+ 130 e
(A) What will be the total sales, S(t), t months after the beginning of the national sales campaign if we assume no sales
at the beginning of the campaign?
0≤t≤21
-0.1t - 130
(B) What are the estimated total sales for the first 8 months of the campaign?
72 million
(Round to the nearest whole number.)
(C) When will the estimated total sales reach $100 million? Use a graphing calculator to approximate the solution to the
equation S(t) = 100.
t≈
(Round to two decimal places as needed.)
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