4400 Higher June 2009 Paper 4 Q11
11 Jagdeesh has to work out \(\dfrac{84.2 \times \sqrt{38.2}}{41.6}\) without using a calculator.
Use suitable approximations to work out an estimate for Jagdeesh’s calculation.
You must show all your working.
(3)
| Scheme | Marks |
|---|---|
| \(\left[\frac{80}{40}\right]\) or \(\left[\frac{84}{42}\right]\) | B1 |
| \(\sqrt{36}\) or 6 | B1 |
| 12 | B1 |
| (3) | |
| (3 marks) |
Notes
B1: dep on both previous B1’s (Accept 10 only if \(\frac{80}{40}\), 6 used)
(Answer only gains no marks)