Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

Alex invests $200 in an account that pays compound interest at r% each year. By the end of 25 years, the investment is valued at $301.10.
(main)[3]

Find r.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “r = 1.65 or 1.649[9...]” …

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