1. R100 000 invested at 12% p.a., compounded monthly, grows to R181 669,67. For how long was the money invested?
2. From Step Ahead Mathematics Grade 12
A long lost relative paid R120 000 for a house a number of years ago. You inherit the property and sell it for R2 800 000. Inflation is calculated at 17%p.a., calculated annually. How many years ago was the house purchased?
3. From Classroom Mathematics Grade 12.
How long would it take an investment to triple if the investment rate is 14%p.a., compounded daily? Give your answer in years and days.
4. How long (correct to the nearest month) will it take a motor car bought for R200 000 to depreciate to R50 000 if depreciation is calculated at 16% p.a.
4.1 on the straight line method;
4.2 on the reducing balance?
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