4MA1/1H Jan 2023, Question 19: Calculating with Bounds
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 5 marks
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The question, in short
Using a = (v − u)/t with v = 45.23, u = 5.12 (2 dp) and t = 8.5 (2 sf), use bounds to find a to a suitable accuracy, showing working and justifying the accuracy.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 5 marks
- 145.235 − 5.115 = 40.12
- 240.12 / 8.45 = 4.7479...
- 345.225 − 5.125 = 40.1
- 440.1 / 8.55 = 4.6900...
- 5both bounds round to 4.7
- 6a = 4.7
Answer4.7
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