Foundation January 2022 Paper 1 Q23
23 \(\qquad a = 4.2 \times 10^{-24} \qquad b = 3 \times 10^{145}\)
Work out the value of \(a \times b\)
Give your answer in standard form.
(2)
| Scheme | Marks |
|---|---|
| \(12.6 \times 10^{(-24 + 145)}\) or \(12.6 \times 10^{121}\) or \(1.26 \times 10^n\) | M1 |
| \(1.26 \times 10^{122}\) | A1 |
| (2) | |
| (2 marks) |
Notes
A1: allow \(1.3 \times 10^{122}\)