4MA1/1H Jun 2021, Question 20: Calculating with Bounds
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 3 marks
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The question, in short
Using t = 9.7, w = 5.9 and y = 3, each given to a stated accuracy, calculate the upper bound of P = (t − w)/y, showing working.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1Largest P: largest t, smallest w, smallest y.
- 2Upper bound of t = 9.75; lower bounds: w = 5.85, y = 2.5
- 39.75 − 5.85 = 3.9
- 4P = 3.9 ÷ 2.5 = 1.56
Answer1.56
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