Higher June 2022 Paper 2R Q9
9 The table gives information about the population, correct to 2 significant figures, of each of five cities in 2018
| City | Population (2018) |
|---|---|
| Ahmedabad | \(7.7 \times 10^6\) |
| Barcelona | \(5.5 \times 10^6\) |
| Chicago | \(8.8 \times 10^6\) |
| Lagos | \(1.3 \times 10^7\) |
| Tokyo | \(3.7 \times 10^7\) |
(a) Write \(8.8 \times 10^6\) as an ordinary number. (1)
(b) Which of these cities had the least population in 2018? (1)
(c) Work out the difference between the population of Tokyo and the population of Ahmedabad in 2018
Give your answer in standard form correct to 2 significant figures. (2)
Give your answer in standard form correct to 2 significant figures. (2)
| Scheme | Marks |
|---|---|
| 8 800 000 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| Barcelona | B1 |
| (1) |
Notes
B1: accept \(5.5 \times 10^6\)
| Scheme | Marks |
|---|---|
| \(3.7 \times 10^7 - 7.7 \times 10^6\) or 29 300 000 oe or 37 000 000 – 7 700 000 or 29 000 000 oe or \(0.29(3) \times 10^8\) or \(29(.3) \times 10^6\) | M1 |
| \(2.9 \times 10^7\) | A1 |
| (2) | |
| (4 marks) |
Notes
M1: allow \(2.9(3) \times 10^n\) \((n \ne 7)\)
A1: accept \(-2.9 \times 10^7\)
accept \(2.93 \times 10^7\) or \(-2.93 \times 10^7\)