Higher Plus
18th September 1975
- 1Velocity Time Graphs2 marks
A train slows steadily from 27 m/s to rest in 5 seconds. Work out its deceleration.
- 2The Sine Rule3 marks
In triangle ABC, angle A is 70°, side a is 14 cm and side b is 11 cm. Work out the acute angle B, to 1 decimal place.
- 3Conditional Probability3 marks
A bag holds 4 red and 8 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 4Histograms3 marks
On a histogram the bar for 30 < x <= 35 has a frequency density of 0.4. How many values are in that class?
- 5Surds3 marks
Simplify sqrt(8) + sqrt(72), giving your answer in the form a sqrt(b).
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