Higher Plus
26th February 1991
- 1Velocity Time Graphs2 marks
A train slows steadily from 40 m/s to rest in 8 seconds. Work out its deceleration.
- 2The Sine Rule3 marks
In triangle ABC, angle A is 61°, side a is 15 cm and side b is 6 cm. Work out the acute angle B, to 1 decimal place.
- 3Conditional Probability3 marks
A bag holds 3 red and 7 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 60 < x <= 65 has a frequency density of 3.5. How many values are in that class?
- 5Surds3 marks
Expand and simplify (5 + sqrt(3))(5 - sqrt(3)).
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