Higher Plus
17th March 1989
- 1Histograms2 marks
On a histogram, a 5-wide bar and a 15-wide bar have the same frequency density of 3. How many more values are in the wider class?
- 2Surds3 marks
Rationalise the denominator of 36/sqrt(3), giving your answer in its simplest form.
- 3Quadratic Inequalities3 marks
Solve x^2 - 2x - 8 > 0.
- 4Velocity Time Graphs3 marks
A tram runs at 7 m/s for 10 s, then slows steadily to rest over 10 s. Work out its average speed for the whole journey, to 2 decimal places.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 10 cm by 14 cm by 12 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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