Higher Plus
7th August 1979
- 1Histograms3 marks
A histogram has two bars: one 5 units wide with frequency density 2.5, one 5 units wide with density 0.8. How many values in total?
- 2Surds3 marks
Expand and simplify (8 + sqrt(6))(8 - sqrt(6)).
- 3Iteration3 marks
Use the iteration x(n+1) = cube root of (12x(n) + 6) with x(0) = 4. Work out x(1) to 3 decimal places.
- 4Velocity Time Graphs2 marks
On a velocity-time graph a car speeds up in a straight line from 3 m/s to 15 m/s over 4 seconds. Work out the acceleration.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 12 cm by 6 cm by 4 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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