Steven has struck a deal with his dad to buy his car when he can afford to. The car is valued at $55 000 today but depreciates at a continuously compounding rate of 1% per month (i.e. 1 - d = e-0.01). Steven has $9 000 in a bank account and plans to add $120 each month end. The bank pays interest at a continuously compounding rate of 1% per month (i.e. 1 + r = e0.01). (a) Formulate the value of the car as a finite difference equation and solve by calculating
Steven has struck a deal with his dad to buy his car when he can afford to. The car is valued at $55 000 today but depreciates at a continuously compounding rate of 1% per month (i.e. 1 - d = e-0.01). Steven has $9 000 in a bank account and plans to add $120 each month end. The bank pays interest at a continuously compounding rate of 1% per month (i.e. 1 + r = e0.01). (a) Formulate the value of the car as a finite difference equation and solve by calculating
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
Related questions
Question
Is my part (c) correct?
![(c) Equating the values of the car and Steven's savings:
To find the time when Steven can buy the car, we need to solve the equation:
V(t) = S(t)
Substituting the expressions we found:
55,000
0.01L
This equation can't be solved analytically, so let's use numerical methods to approximate the value of t
One common numerical method is the Newton-Raphson method. We start by rearranging the
equation to have zero on one side:
55,000
-120€ - 9,000=0
Now, let's define a function f(t) = 55,000e011120t -9,000. We want to find the value of t
where fit) is equal to zero.
We can start with an initial guess fort, such as t=1, and then use the Newton-Raphson method to
iteratively refine our approximation.
The Newton-Raphson iteration formula is given by:
[(L₂)
P(1₂)
= 120€ +9,000
t+=t₂
Where t, is the current approximation, f(ta) is the value of the function at to and f'(t.) is the
derivative of the function at t
Let's calculate the derivative of fit) first.
f'(t)=-550e--120
t₁ = to
= 1
Now, we can start the iteration process:
Initial guess: t, =1
[(4)
P(4)
55,041,201-9,000
55.01.20
t₂ = t₁-
Performing the calculations:
t₁2.376
We continue this process by t, back into the equation:
[(4)
P(4)
₂ 2.381
We repeat these iterations until we reach a desired level of accuracy. Let's continue the calculations:
t2.381
₁2.381
We can see that the value of t stabilizes around t 2.381.
Therefore, the approximate time when Steven can buy the car ist & 2.381 months.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F377b406c-f666-4c6a-b576-22801b03459e%2F18af6027-bb8d-42ec-a53a-7ee26d733a7d%2F4j1g1xc_processed.png&w=3840&q=75)
Transcribed Image Text:(c) Equating the values of the car and Steven's savings:
To find the time when Steven can buy the car, we need to solve the equation:
V(t) = S(t)
Substituting the expressions we found:
55,000
0.01L
This equation can't be solved analytically, so let's use numerical methods to approximate the value of t
One common numerical method is the Newton-Raphson method. We start by rearranging the
equation to have zero on one side:
55,000
-120€ - 9,000=0
Now, let's define a function f(t) = 55,000e011120t -9,000. We want to find the value of t
where fit) is equal to zero.
We can start with an initial guess fort, such as t=1, and then use the Newton-Raphson method to
iteratively refine our approximation.
The Newton-Raphson iteration formula is given by:
[(L₂)
P(1₂)
= 120€ +9,000
t+=t₂
Where t, is the current approximation, f(ta) is the value of the function at to and f'(t.) is the
derivative of the function at t
Let's calculate the derivative of fit) first.
f'(t)=-550e--120
t₁ = to
= 1
Now, we can start the iteration process:
Initial guess: t, =1
[(4)
P(4)
55,041,201-9,000
55.01.20
t₂ = t₁-
Performing the calculations:
t₁2.376
We continue this process by t, back into the equation:
[(4)
P(4)
₂ 2.381
We repeat these iterations until we reach a desired level of accuracy. Let's continue the calculations:
t2.381
₁2.381
We can see that the value of t stabilizes around t 2.381.
Therefore, the approximate time when Steven can buy the car ist & 2.381 months.
![Question 2
Steven has struck a deal with his dad to buy his car when he can afford to.
The car is valued at $55 000 today but depreciates at a continuously compounding rate of
1% per month (i.e. 1 — d = e−0.01).
Steven has $9 000 in a bank account and plans to add $120 each month end. The bank
pays interest at a continuously compounding rate of 1% per month (i.e. 1 + r = 0.0¹).
(a) Formulate the value of the car as a finite difference equation and solve by calculating
the Complementary Function and Particular Solution.
(b) Formulate Steven's Savings amount in a similar way and solve.
(c) Solve to equate the values in (a) and (b) to find the time when Steven can buy the
car.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F377b406c-f666-4c6a-b576-22801b03459e%2F18af6027-bb8d-42ec-a53a-7ee26d733a7d%2F2i6rbhgo_processed.png&w=3840&q=75)
Transcribed Image Text:Question 2
Steven has struck a deal with his dad to buy his car when he can afford to.
The car is valued at $55 000 today but depreciates at a continuously compounding rate of
1% per month (i.e. 1 — d = e−0.01).
Steven has $9 000 in a bank account and plans to add $120 each month end. The bank
pays interest at a continuously compounding rate of 1% per month (i.e. 1 + r = 0.0¹).
(a) Formulate the value of the car as a finite difference equation and solve by calculating
the Complementary Function and Particular Solution.
(b) Formulate Steven's Savings amount in a similar way and solve.
(c) Solve to equate the values in (a) and (b) to find the time when Steven can buy the
car.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 3 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, economics and related others by exploring similar questions and additional content below.Recommended textbooks for you
![ENGR.ECONOMIC ANALYSIS](https://compass-isbn-assets.s3.amazonaws.com/isbn_cover_images/9780190931919/9780190931919_smallCoverImage.gif)
![Principles of Economics (12th Edition)](https://www.bartleby.com/isbn_cover_images/9780134078779/9780134078779_smallCoverImage.gif)
Principles of Economics (12th Edition)
Economics
ISBN:
9780134078779
Author:
Karl E. Case, Ray C. Fair, Sharon E. Oster
Publisher:
PEARSON
![Engineering Economy (17th Edition)](https://www.bartleby.com/isbn_cover_images/9780134870069/9780134870069_smallCoverImage.gif)
Engineering Economy (17th Edition)
Economics
ISBN:
9780134870069
Author:
William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher:
PEARSON
![ENGR.ECONOMIC ANALYSIS](https://compass-isbn-assets.s3.amazonaws.com/isbn_cover_images/9780190931919/9780190931919_smallCoverImage.gif)
![Principles of Economics (12th Edition)](https://www.bartleby.com/isbn_cover_images/9780134078779/9780134078779_smallCoverImage.gif)
Principles of Economics (12th Edition)
Economics
ISBN:
9780134078779
Author:
Karl E. Case, Ray C. Fair, Sharon E. Oster
Publisher:
PEARSON
![Engineering Economy (17th Edition)](https://www.bartleby.com/isbn_cover_images/9780134870069/9780134870069_smallCoverImage.gif)
Engineering Economy (17th Edition)
Economics
ISBN:
9780134870069
Author:
William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher:
PEARSON
![Principles of Economics (MindTap Course List)](https://www.bartleby.com/isbn_cover_images/9781305585126/9781305585126_smallCoverImage.gif)
Principles of Economics (MindTap Course List)
Economics
ISBN:
9781305585126
Author:
N. Gregory Mankiw
Publisher:
Cengage Learning
![Managerial Economics: A Problem Solving Approach](https://www.bartleby.com/isbn_cover_images/9781337106665/9781337106665_smallCoverImage.gif)
Managerial Economics: A Problem Solving Approach
Economics
ISBN:
9781337106665
Author:
Luke M. Froeb, Brian T. McCann, Michael R. Ward, Mike Shor
Publisher:
Cengage Learning
![Managerial Economics & Business Strategy (Mcgraw-…](https://www.bartleby.com/isbn_cover_images/9781259290619/9781259290619_smallCoverImage.gif)
Managerial Economics & Business Strategy (Mcgraw-…
Economics
ISBN:
9781259290619
Author:
Michael Baye, Jeff Prince
Publisher:
McGraw-Hill Education