Higher June 2019 Unit 1 Q7
7.
(a)
(i) A mass is written as 430 kg, correct to the nearest 10 kg.
Circle the least possible value of this mass. [1]
Circle the least possible value of this mass. [1]
420 kg 425 kg 429·5 kg 426 kg 424·9 kg
(ii) A time period is written as 22 seconds, correct to the nearest second.
Circle the least possible value of this time period. [1]
Circle the least possible value of this time period. [1]
22 s 20 s 21 s 21·5 s 21·4 s
(iii) A population is written as 85 people, correct to the nearest five people.
Circle the least possible value of this population. [1]
Circle the least possible value of this population. [1]
83 people 81 people 84 people 82 people 80 people
(b) Calculate \((3{\cdot}4 \times 10^{-5}) \times 700\).
Give your answer in standard form. [2]
Give your answer in standard form. [2]
| Scheme | Marks | Comments |
|---|---|---|
| (i) 425 kg | B1 | |
| (ii) 21·5 s | B1 | |
| (iii) 83 people | B1 |
| Scheme | Marks | Comments |
|---|---|---|
| \(2{\cdot}38 \times 10^{-2}\) | B2 | B1 for sight of a correct answer but not in standard form e.g. \(23{\cdot}8 \times 10^{-3}\) or 0·0238. |