Higher Plus
22nd November 1973
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 11 cm by 11 cm by 9 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
- 2Conditional Probability3 marks
A bag holds 3 red and 6 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
Simplify sqrt(75) + sqrt(48), giving your answer in the form a sqrt(b).
- 5Inverse and Composite Functions3 marks
f(x) = 6x - 6 and g(x) = 6x + 5. Work out fg(-3).
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