Higher Plus
9th April 1982
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 13 cm by 13 cm by 6 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
- 2Conditional Probability3 marks
A bag holds 5 red and 4 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 3Histograms3 marks
A histogram has two bars: one 5 units wide with frequency density 1.5, one 25 units wide with density 3. How many values in total?
- 4Surds3 marks
Rationalise the denominator of 6/sqrt(3), giving your answer in its simplest form.
- 5Inverse and Composite Functions3 marks
f(x) = 6x - 4 and g(x) = 3x - 5. Work out fg(-3).
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