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  2. Accumulation function - Wikipedia

    en.wikipedia.org/wiki/Accumulation_function

    It is used in interest theory. Thus a(0)=1 and the value at time t is given by: = (). where the initial investment is (). For various interest-accumulation protocols, the accumulation function is as follows (with i denoting the interest rate and d denoting the discount rate):

  3. Compound interest - Wikipedia

    en.wikipedia.org/wiki/Compound_interest

    Richard Witt's book Arithmeticall Questions, published in 1613, was a landmark in the history of compound interest. It was wholly devoted to the subject (previously called anatocism), whereas previous writers had usually treated compound interest briefly in just one chapter in a mathematical textbook. Witt's book gave tables based on 10% (the ...

  4. What is compound interest? How compounding works to ... - AOL

    www.aol.com/finance/what-is-compound-interest...

    With a Roth IRA, your investments grow tax-free, provided you follow the rules, which can make compound interest even more beneficial.” Dig deeper: How all 50 states tax retirement income: A ...

  5. Why is compound interest better than simple interest? - AOL

    www.aol.com/finance/why-compound-interest-better...

    For compound interest loans, the interest is based on the principal and the interest combined. Types of loans that often charge compound interest include: Credit cards that carry a balance

  6. Rule of 72 - Wikipedia

    en.wikipedia.org/wiki/Rule_of_72

    The rule number (e.g., 72) is divided by the interest percentage per period (usually years) to obtain the approximate number of periods required for doubling. Although scientific calculators and spreadsheet programs have functions to find the accurate doubling time, the rules are useful for mental calculations and when only a basic calculator ...

  7. What Is a Compound Interest Savings Account? - AOL

    www.aol.com/finance/compound-interest-savings...

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  8. Effective interest rate - Wikipedia

    en.wikipedia.org/wiki/Effective_interest_rate

    For example, a nominal interest rate of 6% compounded monthly is equivalent to an effective interest rate of 6.17%. 6% compounded monthly is credited as 6%/12 = 0.005 every month. After one year, the initial capital is increased by the factor (1 + 0.005) 12 ≈ 1.0617. Note that the yield increases with the frequency of compounding.

  9. Exponentiation - Wikipedia

    en.wikipedia.org/wiki/Exponentiation

    Exponentiation is used extensively in many fields, including economics, biology, chemistry, physics, and computer science, with applications such as compound interest, population growth, chemical reaction kinetics, wave behavior, and public-key cryptography.

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