Higher Plus
30th October 1980
- 1Histograms2 marks
On a histogram, a 10-wide bar and a 30-wide bar have the same frequency density of 3. How many more values are in the wider class?
- 2Surds3 marks
Simplify sqrt(48) + sqrt(27), giving your answer in the form a sqrt(b).
- 3Quadratic Inequalities3 marks
Solve x^2 + x > 0.
- 4Velocity Time Graphs3 marks
A cyclist speeds up steadily from 6 m/s to 11 m/s over 10 seconds. Use the area under the velocity-time graph to find the distance travelled.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 5 cm by 7 cm by 5 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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