Math233 Unit 4 DB 2A AIU



Unformatted Attachment Preview

Don't use plagiarized sources. Get Your Custom Essay on
Math233 Unit 4 DB 2A AIU
Just from $13/Page
Order Essay

MATH233 Unit 4: Logarithmic Functions
Discussion Board Assignment: Version 2A
Note: All work must be shown and explained to receive full credit.
The equation to simulate the time that it will take for an investment to grow based on the interest rate,
compounded monthly, is as follows:
?(?) =
12 ln(1+0.0833?)
where T is the time in years, r is the interest rate (in decimal form), and k represents the growth of the
1. Choose a value for k from the table based on the first letter of your last name for the investment
that you want to simulate, and set up your equation for T(r). Choose a value of k that is different
from your classmates’ values of k.
First letter of your last name Values for k
Investment will grow 1.10 to 1.90 times
Investment will grow 2.10 to 2.90 times
Investment will grow 3.10 to 3.90 times
Investment will grow 4.10 to 4.90 times
2. Find the derivative of T(r) with respect to r, the rate of change in time with respect to the interest
rate using the quotient rule. (Note that ln(k) is a constant.)
3. Choose 5 interest rates between 2% and 20%. Complete the following table by calculating the
values of T(r) and T’(r), correctly rounded to two decimal places. (Note that the rates do not
necessarily have to be whole numbers. Examples such as 5.5% or 9.85% are acceptable.)
Interest Rates, r
Page 1 of 3
4. What can you say about the values that you calculated with the interest rates that you have
5. Show that your interpretation is correct by sketching the graph of T(r) and T’(r) using Excel or
another graphing utility. (If necessary, the graphs may be pasted into a Word document and
attached to the DB thread.)
6. Compare your calculations to any of your classmates’. Explain how different values for k and r
affect your calculations.
7. Which intellipath Learning Nodes helped you with this assignment?
The following are the steps to derive the formula in this assignment from the formula for compounding
interest at discrete periods of time, ? = ?(1 + )?? , where A is the future amount, P is the principal, r is
the decimal equivalent of the annual interest rate, n is the number of times compounded in 1 year, and t is
the total time in years.
? = ?(1 + ? ? ?)12?
= (1 + 0.0833?)12?
ln ? ? = ln(1 + 0.0833?)12?
ln ? ? = 12? × ln(1 + 0.0833?)
ln ? ?
12ln(1 + 0.0833?)
Let ? = , the ratio of the ending amount to the beginning amoutn, and replace t by T(r) to indicate that
this is a function of the decimal equivalent of the annual interest rate, r. Then, we get the following
?(?) =
12 ln(1 + 0.0833?)
Notice that, from the derivation above, if the compounding is quarterly, the formula would be as follows:
Page 2 of 3
?(?) =
Compounding daily would be as follows:
?(?) =
Compounding annually would be as follows:
4 ln(1 + 0.025?)
365 ln(1 + 0.00274?)
?(?) =
ln(1 + ?)
Page 3 of 3

Purchase answer to see full

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more