Higher Plus
25th December 1970
- 1Velocity Time Graphs2 marks
A train slows steadily from 19 m/s to rest in 4 seconds. Work out its deceleration.
- 2Finding the Area of Any Triangle3 marks
A triangle has sides of 13 cm and 11 cm and an area of 35.75 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 3Probability Equation Questions3 marks
A bag holds 12 counters, r of them red. Two are taken without replacement and P(both red) = 5/33. Work out r.
- 4Histograms3 marks
On a histogram the bar for 30 < x <= 40 has a frequency density of 0.4. How many values are in that class?
- 5Surds3 marks
Rationalise the denominator of 55/sqrt(11), giving your answer in its simplest form.
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