Higher Plus
18th November 1965
- 1Histograms2 marks
On a histogram, a 5-wide bar and a 10-wide bar have the same frequency density of 2.5. How many more values are in the wider class?
- 2Surds3 marks
Simplify sqrt(50) + sqrt(2), giving your answer in the form a sqrt(b).
- 3Inverse and Composite Functions3 marks
f(x) = 5x - 7. Work out the inverse function f^-1(x).
- 4Velocity Time Graphs3 marks
A tram runs at 17 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 11 cm by 15 cm by 5 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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