Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

(a(i))[2]

Calculate Alberto’s car value after 3 years.

(a(ii))[3]

Calculate the amount Belinda originally paid for the car.

(b)[2]

Calculate how much Chris invested.

(c(i))[3]

Calculate the yearly interest rate when the interest is simple.

(c(ii))[3]

Calculate the yearly interest rate when the interest is compound.

Worked solution & mark scheme

This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The required expression is $18000\times\left(1-\frac{15}{100}\right)^3$.” …

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