O-LevelMathematicsNumber4024/12 · Oct/Nov 2020 · Q114 Marks
Express 340000 in standard form.
- (a)Express 340000 in standard form.[1]
- (b)Evaluate (4×10⁷)/(8×10²¹), giving your answer in standard form.[2]
- (c)7×10º - 3×10º⁻¹ = k× 10º Find k.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2020). The mark or mark type is shown in brackets.
- [1] 11(a) 3.4 x 10^5 cao
- [2] 11(b) 5 [.0] x 10^-15 cao
- B1 for 0.5 x 10^-14 seen or 1/2 x 10^-14 seen
- or for final answer A x 10^-15 with 1 <= A < 10
- [1] 11(c) 6.7
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