Higher
29th June 1979
- 1Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 9, y = 72. Work out y when x = 12.
- 2SOHCAHTOA (Trigonometry)3 marks
A right-angled triangle has a hypotenuse of 20 cm and an angle of 42°. Work out the side adjacent to that angle, to 1 decimal place.
- 3Probability Trees3 marks
3 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Capture Recapture2 marks
A capture-recapture estimate is made of the newt population of a stream. State one assumption the method relies on.
- 5Standard Form2 marks
Work out (7 x 10^3) x (2 x 10^-4). Give your answer in standard form.
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