$4\mathrm{.}1$ If you are $20$ years of age and save R$20$ each day for the rest of your life. At the age of $60$

years, how much will that investment worth if the annual interest rate is $10\%.(5)$

$4\mathrm{.}2$ NM borrow R$270000\mathrm{.}00$ from his credit card facility to build a house. The interest rate on

the loan is $0\mathrm{.}5\%$ per mon