Mathematics 0580 · IGCSE · Exponential growth and decay

Exponential growth and decay — practice question

The number of butterflies in one variety is falling exponentially by $34\%$ each year. By the end of 2014, the population had reached $125.9$ million.

(main)[2]

Calculate the population for the end of 2019.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct percentage decrease method.” …

Full mark scheme, point by point
Step-by-step worked solution
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