If Menciksh pays an inderest of 21 for 9 jears on a sum of \( \$ 2500 \), rate of incevest per annum.

Boitumelo invests an amount of R28 000 for a period of 7 years. For the first two years the interest was \( 12 \% \) p.a. compounded semi-annually. The interest was then changed to \( 10 \% \) p.a. compounded quarterly. Determine the value of the investment after the 7 -year period.

A lawnmower was traded in for \( R 236 \) after 10 years. The depreciation was calculated at \( 9,2 \% \) p.a. on a straight-line basis. Determine the cost of the lawnmower 10 years ago.

R4 800. He paid a deposit of R1 200 and opted to pay instalments of R400 each month to complete the balance of R3 600 .

2.2 Convert an interest rate of \( 10 \% \) pal compounded quarterly to an annual effective interest rate. A lawnower was traded in for 2.326 anter 10 years. The depreciation was caleulated at \( 9.2 \% \) p.a. on a straight-line basis. Determine the cost of the lawnmower 10 years ago.

Determine the number of months to complete paying for the balance.