Mathematics 4024 · O Level · Standard form

Standard form — practice question

This gives $a = \frac{b^2 + c}{d}$.

(a(i))[3]

Find $a$ when $b = 4 \times 10^2$, $c = 6 \times 10^3$ and $d = 2 \times 10^2$. Write the result in standard form.

(a(ii))[3]

Rearrange the formula so that $b$ is the subject.

(b)[2]

Given $m \times 10^4 + m \times 10^2 = 36\,360$, calculate $m \times 10^4 - m \times 10^2$.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The answer is $8.3\times10^2$.” …