Higher Plus
24th March 1990
- 1Histograms2 marks
On a histogram, a 5-wide bar and a 10-wide bar have the same frequency density of 1.5. How many more values are in the wider class?
- 2Bounds3 marks
A car covers 670 m (to the nearest 10 m) in 8 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
- 3The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 4, 8, 16, 28, ...
- 4Velocity Time Graphs3 marks
A cyclist speeds up steadily from 8 m/s to 12 m/s over 12 seconds. Use the area under the velocity-time graph to find the distance travelled.
- 5Perpendicular Lines and the equation of a tangent3 marks
The point (9, 40) lies on the circle x^2 + y^2 = 1681. Work out the gradient of the tangent to the circle at that point.
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