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Browse High School Interest
Stars indicate particularly interesting answers or
good places to begin browsing.
 Accumulating Interest [06/26/2003]

Michael deposits $355 each month into an account that pays 3%
interest, accrued monthly. How much money will he have after 3
months? 6 months? 12 months?
 Calculating Interest on Auto Loans [7/10/1996]

How do the the lien holders for auto loans calculate interest on the
principle?
 Coal Consumption [01/13/1997]

How long will coal reserves last if consumption increase at the rate of
3.1 percent per year?
 Formula for Compound Interest [3/31/1995]

Please send the formula(s) for calculating interest compounded annually,
daily, and continuously.
 Interest: Definitions [9/25/1996]

What is compound interest? What is continuous compounding?
 Paying off the Mortgage [10/08/1998]

You have a 30year mortgage with monthly payments of $370 at 8%. If you
instead pay $400 each month, when will you pay it off?
 Rate vs. Yield [01/31/2002]

What is the interest amount for the period from Sept. 05, 2001 to Dec.
04, 2001, at 5% interest, compounded daily, on principal of $356,964.15?
 15 Percent Annual Interest [8/24/1996]

How much money will I will have in 29 years if I save $120 per month at
15 percent annual interest?
 Abraham Lincoln and the Rules of Three, Double and Single [06/08/2013]

Doctor Wallace extends the kind of proportional thinking suggested by
a student attempting a problem that Abraham Lincoln once solved.
Doctor Peterson follows up by looking back into the kind of ciphering
textbooks the Civil War President would have learned from, then solves
the same interest rate problem with a formula more familiar to modern
students.
 Amount of an RRSP [03/24/2002]

Brian makes $2500 deposits into his Registered Retirement Savings Plan on
his 20th, 25th, 30th, 35th, and 40th birthdays. The RRSP pays 7% per
annum, compounded annually. Determine the value of Brian's RRSP when he's
65.
 Amount of Interest Earned in a Year [11/28/1995]

If Li Fong had earned one fourth of a percent more in annual interest on
an investment, the interest for one year would have been $45 greater. How
much did she invest at the beginning of the year?
 Analyzing Monthly Payments [05/13/1998]

How much principal and how much interest have been paid after n payment
cycles?
 Annuities [12/31/2001]

If I have $100,000 at 5% interest and withdraw from it for 20 years,
leaving a zero balance, how much monthly income will I have?
 An Annuity [12/13/1995]

Compound interest with monthly installments.
 Best Strategy for Paying Off Credit Card Debt [04/30/2007]

I have several credit cards, each with different balances and interest
rates. I can pay a fixed amount each month to reduce my debt. How do I
figure out the best way to distribute that payment to minimize my
interest as much as possible?
 Calculating Adjustable Rate Mortgages [04/25/2002]

If I am applying for a loan of $200,000 with the rate of 5.875 using a
3/1 ARM (adjustable rate mortgage), how do I calculate the payment?
 Calculating an APR [10/01/2002]

A company made a loan for 12 months. The total amount was $790.60 and
they charged $94.83 interest. How can I calculate the APR?
 Calculating Monthly Payment on a Loan [03/22/2005]

What is the formula to calculate the monthly payment for a loan
amortization table? Since the amount of principal and interest per
payment both vary over the life of the loan, I'm not sure how to come
up with that amount.
 Car Loan Rates [08/27/1997]

Can you help me calculate the impact of different interest rates on a 5
yr. car loan (60 payments) of $20,000?
 Compounding Interest and e [11/11/1998]

How is the number e derived from compounding interest? Does it come from
the series expansion of e?
 Compound Interest [04/11/1997]

How many years will be needed for $5000 to increase to $22,000 at 11
percent interest compounded monthly?
 Compound Interest [07/30/1997]

I want to buy a car that costs $20,058.00 and would like to know how they
calculate the interest on my loan.
 Compound Interest [05/30/2001]

Computing compound interest with known variables.
 Compound Interest  Rule of 70 [11/29/1994]

There is a famous "Rule of 70" for compound interest. What is it and why
does it work?
 Compound interest to a specific amount [07/24/1997]

How long would it take for a regular deposit account to equal one million
dollars, assuming monthly payments of $100.00 at 8, 10 and 12 percent
interest?
 Compound interest with Repayments [07/24/1997]

I need a compound interest formula with repayments, such as in a bank
situation.
 Credit Card Calculations [1/24/1996]

I have textbooks and programs, none of which cover the calculation
typical of credit card balance payoffs  how long will it take?
 Credit Card Debt [05/09/1997]

How do credit card companies figure out how long it will take to pay off
debt?
 Declining Balance Interest [03/22/1999]

Can you explain declining balance interest to a high school business
class?
 Derivative of e^x [10/28/1999]

How can I prove that the derivative of e^x is e^x?
 Dividing Investments for Maximum Return [09/26/1999]

How should one invest $60,000 in mutual funds with a return of 10% and
municipal bonds with a return of 12% in order to maximize income?
 Doubling Time [03/08/2002]

If the cost of an allday ski lift ticket at Colorado's Vail Ski Area has
been growing at about 7% per year ever since 1963, when a ticket was $5,
what did it cost in 1993?
 Endowment Awards [05/09/1997]

An endowment of $15,000 is made which earns 7.25% interest compounded
continously. How large must the endowment grow for it to support an
annual award of $1,200 in perpetuity?
 Euler's Number [01/28/1998]

Why is Euler's number referred to as the natural base?
 Exceeding the Monthly Payment [05/28/2010]

When a borrower pays in excess of an installment amount, how do you
calculate the resulting pricipal and interest? Doctor Wilko explains that
lenders service interest first, then apply additional funds to lower any
outstanding balance, illustrating with an example.
 Exponential Growth & Compound Interest [6/2/1996]

(1) The cost of goods and services in an urban area increased 1.5% last
month. If the rate continues, what will be the annual rate of increase?
(2) Suppose a certain population increases by 30% every 10 years. By what
percent does it increase each year?
 Extra Loan Payments, Amortization Tables [03/31/1998]

If one extra payment is made each year, how much money will be saved over
the life of a 30year mortgage and how much sooner will it be paid off?
 Financial Calculator: PerSense [03/19/2002]

What I understand is that part of the payment I make each month goes
toward payment of the interest on the current balance of the loan, and
part of it goes toward paying off the principal. Can you explain?
 Finding Roots on a Calculator [04/22/2001]

How can I use the equation HPR = (1.667)^(1/5) on a calculator that does
not have a fifth root key?
 Formula for 8 Percent Interest [5/31/1996]

I put $15 a month into a saving account and at the end of each year I get
8 percent interest...
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