Mathematics 0580 · IGCSE · Exponential growth and decay
Exponential growth and decay — practice question
(a(i))[2]
Find how much the biscuits cost.
(a(ii))[2]
Work out how much of the $9 Kolyan spends on water and biscuits altogether. Give your answer in its lowest terms.
(a(iii))[3]
Calculate how much Kolyan had to spend last week.
(b)[3]
Calculate the value of Priya’s bicycle after 10 years, giving your answer to the nearest dollar.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Divide $2.6$ by $2$ to obtain $1.3$, which is then scaled to $3.9$.” …