Higher January 2021 Paper 2R Q8
8 The table gives the length of the coastline, in kilometres, of each of five oceans.
| Ocean | Length of coastline (km) |
|---|---|
| Arctic | \(4.539 \times 10^4\) |
| Atlantic | \(1.119 \times 10^5\) |
| Pacific | \(1.357 \times 10^5\) |
| Indian | \(6.653 \times 10^4\) |
| Southern | \(1.797 \times 10^4\) |
(a) Which ocean has the greatest length of coastline? (1)
(b) Calculate the difference between the length of the Atlantic Ocean’s coastline and the length of the Southern Ocean’s coastline.
Give your answer in standard form. (2)
Give your answer in standard form. (2)
| Scheme | Marks |
|---|---|
| Pacific | B1 |
| (1) |
Notes
B1: Accept \(1.357 \times 10^5\)
| Scheme | Marks |
|---|---|
| \(1.119 \times 10^5 - 1.797 \times 10^4\) | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: \(9.393(0) \times 10^4\) | A1 |
| (2) | |
| (3 marks) |
Notes
M1: Accept 111 900 – 17 970 oe
or 93 930 or −93 930
A1: Accept \((\pm)\; 9.393(0) \times 10^4\)
or \((\pm)\; 9.39 \times 10^4\) or \((\pm)\; 9.4 \times 10^4\)