O-LevelMathematicsNumber4024/12 · May/June 2021 · Q133 Marks
Write 0.000053 in standard form.
- (a)Write 0.000053 in standard form.[1]
- (b)Evaluate (1.5×10¹⁴) × (8×10⁶). Give your answer in standard form.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [1] (a) 5.3 × 10⁻⁵ cao
- [2] (b) 1.2 × 10²¹ cao
- [2] (b) B1 for 12 × 10²⁰ oe seen or for answer A×10²¹ with 1 ≤ A < 10
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