Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

(a(i))[2]

Calculate the value of this investment at the end of 5 years.

(a(ii))[2]

Calculate the total percentage increase in the value of Beth’s investment after 5 years.

(a(iii))[3]

Calculate the minimum number of complete years needed for the value of Beth’s investment to rise from $2000 to more than $2500$.

(b)[3]

Calculate the population 16 years earlier.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: Approximately $2210$ (or $2208$ to $2208.2\ldots$)

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