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4024/12 May/Jun 2021, Question 13: Standard Form

Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 3 marks

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The question, in short

Convert 0.000 053 to standard form, then evaluate (1.5 × 10¹⁴) × (8 × 10⁶), giving the result in standard form.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

Express 0.000 053 in standard form.

  1. 10.000 053 = 5.3 × 10⁻⁵

Answer5.3 × 10⁻⁵

Part (b) · 2 marks

Work out (1.5 × 10¹⁴) × (8 × 10⁶) and give the answer in standard form.

  1. 11.5 × 8 = 12 and 10¹⁴ × 10⁶ = 10²⁰
  2. 212 × 10²⁰ = 1.2 × 10²¹

Answer1.2 × 10²¹

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Also searched as: 4024/12/M/J/21 · 4024_s21_qp_12 · 4024 s21 12 · question 13.
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