g11 9 finance growth and decay

9. FINANCE, GRO GROWTH WTH & DECAY 

Simple Interest  Compound Interest with Effective Interest Rates Interest est with Nominal Inter Interest est Rates  Compound Inter  Conversion Formula  Timelines  Simple & Compound Growth  Simple Depreciation  Compound Depreciation 1

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SIMPLE INTEREST Interestt is  Interes

calculated on the original orig inal amount Interestt remains constant over the period of  Interes time

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Peter invests R4 000 for a period of 6 years at 7,5% p.a. simple interest. interest. Calculate the value value of Peter’s investment at the end of the 6 years.

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COMPOUND INTEREST with EFFECTIVE INTEREST RATES Interestt  Interes

is calculated on the original amount plus the interes interestt added at each time interval  Effective interest rate is calculated per annum

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Romy borrows R12 500 for 2 years at 8,4% p.a. compounded. Determine how much Rom Romy y owes after 2 years.

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COMPOUND INTEREST with NOMINAL INTEREST RATES

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COMPOUND INTEREST with NOMINAL INTEREST RATES  When

working with nominal interest rates, rates, the compound interest rate formula is altered

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Liora invests R9 750 for 3 years at 6% p.a. compounded monthly. Determine the value of Liora’s investment after 3 years. Working with Nominal

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CONVERSION FORMULA

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Which is the better interest rate for saving: 10,5% p.a. or 10,1% compounded quarterly? Working with the

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TIMELINES  Timelines

are used to visualize visuali ze multiple deposits / withdrawals and also multiple changes in interest rates

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