Alright Mazindela — let's do this. 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. 3.2 Step 1: Calculate the total number of months Mr. Molopa saved. $$ \text{Number of months} = 2 \text{ years} \times 12 \text{ months/year} = 24 \text{ months} $$ Step 2: Calculate the total amount saved. $$ \text{Total amount saved} = \text{R}800/\text{month} \times 24 \text{ months} $$ $$ \text{Total amount saved} = \boxed{\text{R}19200.00} $$ This is the amount he would be able to invest. 3.3 Step 1: Identify the principal amount, interest rate, and investment period. Principal ($P$) = R19200.00 (from 3.2) Interest rate ($i$) = 12.5% p.a. = 0.125 Investment period ($n$) = 2.5 years Step 2: Use the compound interest formula to calculate the future value ($A$). $$ A = P(1 + i)^n $$ $$ A = \text{R}19200.00(1 + 0.125)^{2.5} $$ $$ A = \text{R}19200.00(1.125)^{2.5} $$ $$ A = \text{R}19200.00 \times 1.32986076... $$ $$ A = \text{R}25533.3266... $$ $$ A = \boxed{\text{R}25533.33} $$ This is how much he will earn at the end of the investment period. 3.4 Step 1: Calculate the total interest earned. $$ \text{Interest Earned} = \text{Future Value} - \text{Principal} $$ $$ \text{Interest Earned} = \text{R}25533.33 - \text{R}19200.00 $$ $$ \text{Interest Earned} = \boxed{\text{R}6333.33} $$ Got more? Send 'em!