Higher Plus
14th July 1975
- 1Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 3, y = 16. Work out y when x = 4.
- 2The Cosine Rule3 marks
A triangle has sides 22 cm, 12 cm and 14 cm. Work out the angle opposite the 22 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 5 red and n blue counters. The probability of taking a red is 5/13. Work out n.
- 4Histograms3 marks
A histogram has four 20-wide classes from 0, with frequency densities 0.5, 1, 3, 2. Which class contains the median?
- 5Bounds3 marks
A block has mass 430 g (to the nearest 10 g) and volume 24 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.
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