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Interest is the actual amount of money earned or paid for the use of money over a period. The interest rate is the percentage at which interest is calculated, usually expressed annually.

Economics

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Answers

3 parts
3.2

R19200.00\text{R}19200.00

3.3

R25533.33\text{R}25533.33

3.4

R6333.33\text{R}6333.33

Step-by-step solution

5 steps

Part 3.1

Interest is the actual amount of money earned or paid for the use of money over a period. The interest rate is the percentage at which interest is calculated, usually expressed annually.

Part 3.2

R19200.00\text{R}19200.00

  1. Calculate the total number of months Mr.

    Molopa saved.

    Number of months=2 years×12 months/year=24 months\text{Number of months} = 2 \text{ years} \times 12 \text{ months/year} = 24 \text{ months}
  2. Calculate the total amount saved.

    Total amount saved=R800/month×24 months\text{Total amount saved} = \text{R}800/\text{month} \times 24 \text{ months} Total amount saved=R19200.00\text{Total amount saved} = \boxed{\text{R}19200.00}

    This is the amount he would be able to invest.

Part 3.3

R25533.33\text{R}25533.33

  1. Identify the principal amount, interest rate, and investment period.

    Principal (PP) = R19200.00 (from 3.2)
    Interest rate (ii) = 12.5% p.a. = 0.125
    Investment period (nn) = 2.5 years

  2. Use the compound interest formula to calculate the future value (AA).

    A=P(1+i)nA = P(1 + i)^n A=R19200.00(1+0.125)2.5A = \text{R}19200.00(1 + 0.125)^{2.5} A=R19200.00(1.125)2.5A = \text{R}19200.00(1.125)^{2.5} A=R19200.00×1.32986076...A = \text{R}19200.00 \times 1.32986076... A=R25533.3266...A = \text{R}25533.3266... A=R25533.33A = \boxed{\text{R}25533.33}

    This is how much he will earn at the end of the investment period.

Part 3.4

R6333.33\text{R}6333.33

  1. Calculate the total interest earned.

    Interest Earned=Future Value−Principal\text{Interest Earned} = \text{Future Value} - \text{Principal} Interest Earned=R25533.33−R19200.00\text{Interest Earned} = \text{R}25533.33 - \text{R}19200.00 Interest Earned=R6333.33\text{Interest Earned} = \boxed{\text{R}6333.33}
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