Higher Plus
8th January 1982
- 1Velocity Time Graphs2 marks
A train slows steadily from 18 m/s to rest in 8 seconds. Work out its deceleration.
- 2The Cosine Rule3 marks
A triangle has sides 21 cm, 8 cm and 16 cm. Work out the angle opposite the 21 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 8 red and n blue counters. The probability of taking a red is 8/13. Work out n.
- 4Histograms3 marks
On a histogram the bar for 10 < x <= 30 has a frequency density of 2.4. How many values are in that class?
- 5Surds3 marks
Rationalise the denominator of 60/sqrt(5), giving your answer in its simplest form.
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