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Mark scheme and answers · Total marks: 58

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Question 1 [1 mark]

1,240,000

Question 2 [1 mark]

7.42 × 10⁵

Question 3 [1 mark]

0.00000063

Question 4 [1 mark]

0.00099

Question 5 [1 mark]

6.8 × 10^−2

Question 6 [2 marks]

5.4 × 10⁸

Question 7 [1 mark]

Question 8 [1 mark]

0.027027

Question 9 [2 marks]

200

Question 10 [1 mark]

Four hundred and seventy thousand

Question 11 [3 marks]

0.00033, 0.87, 46, 720, 6,311, 466,000

Question 12 [3 marks]

9.17 × 10⁵

Question 13 [5 marks]

2.0 × 10⁵

Question 14 [3 marks]

1.6 × 10³ grams

Question 15 [3 marks]

3.4 × 10³ people per km²

Question 16 [2 marks]

1.2 × 10⁷ calculations

Question 17 [1 mark]

5.6 × 10⁻⁵

Question 18 [3 marks]

3.1 × 10⁹ seconds

Question 19 [1 mark]

0.0072

Question 20 [2 marks]

Question 21 [2 marks]

9 × 10¹⁰

Question 22 [2 marks]

9 × 10⁶

Question 23 [3 marks]

1.66 × 10⁻²⁷ kg

Question 24 [1 mark]

0.0000304

Question 25 [2 marks]

5 × 10¹ m²

Question 26 [1 mark]

8.92 × 10⁻⁷

Question 27 [2 marks]

1.2 × 10⁸ km

Question 28 [2 marks]

2 × 10²

Question 29 [3 marks]

6 × 10⁻² m

Question 30 [2 marks]

3 × 10⁴ km/s