4MA1/1HR Jan 2023, Question 14: Upper and Lower Bounds
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1HR (Higher) · Calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Given T = p/r with p = 0.51 and r = 6.3, both rounded to 2 significant figures, calculate the upper bound of T, showing your method.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1p = 0.51 correct to 2 significant figures, so upper bound of p is 0.515
- 2r = 6.3 correct to 2 significant figures, so lower bound of r is 6.25
- 3T = p / r, so upper bound of T is 0.515 / 6.25
- 40.515 ÷ 6.25 = 0.0824
Answer0.0824
Stuck on a step? Read the free lesson: Upper and Lower Bounds
Practise more upper and lower bounds questions
Real 4MA1 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on upper and lower bounds
Also searched as: 4MA1 1HR January 2023 · 4MA1/1HR · 4ma1 jan23 1hr · question 14.
Lemmara is an independent study tool, not affiliated with or endorsed by Pearson Edexcel. The worked solutions are Lemmara’s own.