Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

The world’s population is estimated to be increasing by $1.14\%$ each year. On January $1$st $2014$, the population stood at $7.23$ billion.

(a)[2]

Determine the expected population on January $1$st $2020$.

(b)[2]

Determine the year when the population is predicted to reach $10$ billion.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “between $7.739$ billion and $7.74$ billion” …