IMathAS-libretexts

Rachelle works as a bus driver for the Gautrein buses and initially earns $\displaystyle {R}$ $\displaystyle {120000}$ in her first year. Thereafter her salary increases with $\displaystyle {R}$ $\displaystyle {14000}$ per year. In her first year her expenses totals $\displaystyle {R}$ $\displaystyle {90000}$ and increases yearly with $\displaystyle {R}$ $\displaystyle {8000}$ .

Question 1

Express Rachelle's total savings over time as a series of 3 terms.

$\displaystyle +\ldots$

Question 2

How long will it take her to save up $\displaystyle {R}$ $\displaystyle {1458000}$ , if the money was never deposited into a bank to earn interest.

Formula

(ignore subscripts in this step but not in written work)

Stocktake

Type in the list of known variables, example x=1,y=2...:

Substitute

(use subscripts if necessary in this step)

Solve

$\displaystyle {n}=$ (use subscripts if necessary in this step)

It will take her years to save up $\displaystyle {R}$ $\displaystyle {1458000}$ .

\displaystyle