Higher Plus
5th November 1980
- 1Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 1.2, one 5 units wide with density 3.5. How many values in total?
- 2Bounds3 marks
A rectangle is 30 cm by 12 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 3Completing the Square3 marks
Write x^2 + 2x - 9 in the form (x + a)^2 + b.
- 4Velocity Time Graphs2 marks
On a velocity-time graph a car speeds up in a straight line from 6 m/s to 8 m/s over 4 seconds. Work out the acceleration.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 7 cm by 5 cm by 5 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
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