Higher Plus
12th July 1980
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 7 cm by 5 cm by 6 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
- 2Probability Equation Questions3 marks
A bag holds 4 red and n blue counters. The probability of taking a red is 4/7. Work out n.
- 3Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 0.4, one 5 units wide with density 1.4. How many values in total?
- 4Bounds3 marks
A car covers 370 m (to the nearest 10 m) in 6 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
- 5Iteration3 marks
Use the iteration x(n+1) = cube root of (7x(n) + 3) with x(0) = 1. Work out x(1) to 3 decimal places.
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