Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

Amir places $1500$ into an account. The account earns compound interest at a rate of $r\%$ per year. After 8 years, the investment is worth $1656.73$.
(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: “Eighth-root form $\sqrt[8]{\frac{1656.73}{1500}}$” …

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