Higher Plus
16th September 1977
- 1Histograms2 marks
On a histogram, a 5-wide bar and a 10-wide bar have the same frequency density of 1.5. How many more values are in the wider class?
- 2Surds3 marks
Rationalise the denominator of 54/sqrt(6), giving your answer in its simplest form.
- 3Inverse and Composite Functions3 marks
f(x) = 6x - 7 and g(x) = 5x + 3. Work out fg(3).
- 4Velocity Time Graphs3 marks
A tram runs at 16 m/s for 20 s, then slows steadily to rest over 4 s. Work out its average speed for the whole journey, to 2 decimal places.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 15 cm by 13 cm by 4 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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