Higher Plus
4th October 1987
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 11 cm by 8 cm by 7 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
- 2Probability Equation Questions3 marks
A bag holds 3 red and n blue counters. The probability of taking a red is 3/10. Work out n.
- 3Histograms3 marks
A histogram has two bars: one 5 units wide with frequency density 1.2, one 5 units wide with density 1.4. How many values in total?
- 4Bounds3 marks
x = 164 and y = 128, each correct to the nearest whole number. Work out the upper bound of x - y.
- 5Inverse and Composite Functions3 marks
f(x) = 5x - 3. Work out the inverse function f^-1(x).
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