Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

Jess puts $1400 into an account. The account earns compound interest at $r\%$ per year. After 4 years, the investment is worth $1523.15$.
(main)[3]

Calculate the value of $r$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “about $2.128$ to $2.13$” …

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