Simple and Compound Interest Worksheet - Home of the …
Compound Interest Worksheet
Name: ______________________________Period____________Date
In problems1-3, compare the amount you have if the money were compounded annually versus quarterly
Write out and solve 2 equations per problem
1. $5,000 at 10% for 5 years
2. $2,000 at 12% for 3 years
3. $1,000 at 14% for 30 years
In problems 4-6, compare the amount of money you have if the investment is compounded annually versus daily. Write out and calculate 2 equations per problem
4. $1,000 at 8% for 5 years
5. $2,000 at 12% for 3 years
6. $5,000 at 12% for 20 years
Fill in the blanks for problems 7-12.
|Compounding |Principal |Yearly rate |Time |Period rate |Number of |Total Amount (A)|Total amount |
|Period (n) |(P) |( r ) |(t) |(r/k) |periods, (kt) | |earned (I) |
|7. Annually |$1,000 |9% |5 years | | | | |
| | | | | | | | |
|8. Semiannually |$1,000 |9% |5 years | | | | |
| | | | | | | | |
|9. Quarterly |$500 |8% |3 years | | | | |
| | | | | | | | |
|10. Monthly |$350 |12% |5 years | | | | |
| | | | | | | | |
Answer the questions in problems 13-15.
13. What is the future amount of $12,000 invested for 5 years at 14% compounded monthly?
14. What is the future amount of $800 invested for 1 year at 20% compounded daily?
15. If $5,000 is compounded quarterly at 51/2 % for 12 years, what is the total interest (money made) received at the end of that time?
The inflation rate is an increase in currency that is in circulation (the cash and coins that are out floating around the U.S.). When the inflation rate increases the value of the dollar decreases, therefore prices go up!
A person wants to know what the future cost of items will be, only accounting for inflation. (ex) The inflation rate in 1990 was about 6%. (NOTE** The only problem with inflation is that the rate fluxuates from year to year, so you must realize this is an ESTIMATE.) You just use the compound interest formula.
A = P(1 + r/m)mt
A= P(1 + r)t Note: This is the actually formula due to n being equal to 1.
A= 30,000(1.06)10
A=$53,725.43 WOW!!! What a difference!!!
In problems 16-20, calculate the expected price in the year 2008 if you assume that there was a consistent 5% inflation rate and use the given 1988 price. Answers should be rounded to the nearest penny.
16. Median Salary, $27,225
17. Gallon of gas, $1.08
18. Dozen Eggs, $0.89
19. Movie Admission, $3.50
20. McDonalds Hamburger, $0.62
Use the following situations to find when an account will reach a certain amount of money. (hint use your graphing calculator)
21. You invest $1,000 at a fixed rate of 7% compounded monthly, when will your account reach $10,000?
(round to the nearest year)
22. You purchase a house for $250,000 which increases in value every year at 4.5%. You plan to sell your house when it is worth $300,000. How many years will you have to live in the house?
23. Your parents start a college fund with $1500 that grows at 6.2% each year, when will the account reach $22,000 which will be the cost of your first 2 years of college?
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