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Math 108 Topics in Mathematics | Section 0203 | James Baglama | **Chapter 21**

Reading Assignment |
Video |
Lecture Notes |

21.1 Arithmetic Growth and Simple Interest pages 767 - 769 |
Section 21.1 Video |
Section 21.1 Lecture notes |

21.2 Geometric Growth
and Compound Interest pages 769 - 777 |
Section 21.2 Video |
Section 21.2 Lecture notes |

21.3 A Limit to Compounding pages 778 - 780 |
Section 21.3 Video |
Section 21.3 Lecture notes |

21.4 A Model for Saving pages 780 - 784 |
Section 21.4 Video |
Section 21.4 Lecture notes |

21.5 Present Value and Inflation pages 784 - 788 |
Section 21.5 Video |
Section 21.5 Lecture notes |

- Apply the simple interest formula to calculate the balance of a savings account.
- Apply the compound interest formula to calculate the balance of a savings account.
- Describe the difference between arithmetic and geometric growth.
- Calculate the APY for a compound interest account.
- Calculate the APY for a compound interest account.
- Use the savings formula or payment formula to determine required deposits into a sinking fund.
- Calculate depreciation of a financial asset, given a negative growth rate.
- Use the Consumer Price Index to find the current cost of goods.

- The quiz for Chapter 21 will be available from 12:00am Apr. 13 - 11:55pm Apr. 29.
- The quiz will consist of 10 multiple choice questions.
- You will have a maximum of four hours to complete the quiz.
- You will be allow two tries. The computer will accept the best score.
- Failure to take the quiz by 11:55pm Apr. 29 will be given a zero. No exceptions!

- Chapter 21

pages 794 - 800 Problems 3, 11, 12, 24, 56

Due by 11:59pm Wednesday April 29 - Use Assignments tool to submit homework.
- Homework help.
- Problem 3. Carefully read Section 21.1 before responding to this exercise.
- Problems 11 and 12. Carefully read Section 21.2 before responding to these exercises.
- Problem 24. Carefully read Section 21.3 before responding to this exercise.
- Problem 56. Carefully read Section 21.5 before responding to this exercises.

- I will NOT accept homework with answers only.

- Go to the companion website and navigate to applet exercises for chapter 21 and try the applet Saving for Retirement
- In the companion website navigate to Video Clips for chapter 21.
- Watch the movie The Mathematics of Geometric Growth
- Watch the movie A Model for Accumulation
- Watch the movie Exponential Decay

- In the companion website try online quiz for chapter 21.

Each worksheet will have 10 questions (each worth 1 point). The worksheets are designed to help you understand material. The worksheets are downloadable from the Assignment tool within Sakai as a Microsoft Word (or OpenOffice) and also as a pdf file. You can write on the worksheets and upload your answers or (similar to homework submissions) take a digital picture of your handwritten assignment with a camera or smart phone. All worksheet answers must be submitted within Sakai. The due dates for the worksheets are one week before the due date for homework assignments, so that you can get feedback on problems before submitting your homework and doing your quizzes. DO NOT SUBMIT ASSIGNMENTS VIA EMAILS OR FAXES! I will not accept them! Do not ask to submit late worksheets.

- Due by 11:59 pm Wednesday Apr. 22
- Use the Assignments tool to submit worksheet.

- Should you stock up on “forever” stamps? In 2007 the U.S. Postal Service began selling such stamps, which will suffice for first-class postage at any time in the future, even when rates rise. On Jan. 26, 2014 the U.S. Postal Service increased the price of these stamps to $0.49. Would it be a good investment to buy a “lifetime supply” of them? To render your judgment, compare the historic increases postal rates (see www.vaughns-1-pagers.com/economics/postal-rates.htm) with the CPI (p. 816). For example, you could convert postal rates at each of the dates of change to the cost in today's dollars, then see if there appears to be a recent trend that you can project into the future.

- Discussion for Chapter 21 will open at 12:00 am Monday April 13
- You are required to participate in the discussion boards.
- Discussion topic will end at 11:55 pm Wednesday April 29
- See the syllabus on the grading rubric for discussions.

__Texting Number:__
(401) 268-7160

__Email:__ jbaglama@math.uri.edu

__Office hours:__
By appointment

__Office:__
Lippitt Hall 200

__Office Phone:__
(401) 874-2709

The required textbook,
"For All Practical Purposes", 9^{th} edition by COMAP,
Publisher W.H. Freeman. Do NOT use an older edition. All students
must have either a phyiscal copy of the textbook or an
ebook.Click
on the textbook above to go to the ebook.

The required textbook,
The textbook "For All Practical Purposes", 9^{th} edition by COMAP,Publisher W.H. Freeman
has a campanion website. The campanion website contains a lot helpful material,e.g. Java Applets, falshcards, practice quizzes.
The site can be accessed via the link
Campanion or click
on the picture above to go to the campanion website.

Math 108 Topics in Mathematics | James Baglama | jbaglama@math.uri.edu | University of Rhode Island.