4400 Higher June 2010 Paper 4 Q22
22
(a) Work out \(5.2 \times 10^2 + 2.3 \times 10^4\)
Give your answer in standard form. (2)
Give your answer in standard form. (2)
(b) \(a \times 10^2 + b \times 10^4 = c \times 10^4\)
Express \(c\) in terms of \(a\) and \(b\). (2)
Express \(c\) in terms of \(a\) and \(b\). (2)
| Scheme | Marks |
|---|---|
| 23 520 | M1 |
| \(2.352 \times 10^4\) | A1 |
| (2) |
Notes
M1: figs 235 or 2352
A1: cao
| Scheme | Marks |
|---|---|
| \(a/100 \times 10^4 + b \times 10^4\ (= c \times 10^4)\) | M1 |
| \(0.01a + b\) oe | A1 |
| (2) | |
| (4 marks) |
Notes
M1: M1 for \(0.01a\) seen or making index powers the same or \(a + 100b = 100c\) or dividing both sides by \(10^4\)