Higher Plus
24th February 1988
- 1Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 5, y = 64. Work out y when x = 4.
- 2Finding the Area of Any Triangle3 marks
A triangle has sides of 14 cm and 13 cm and an area of 45.50 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 3Probability Equation Questions3 marks
A bag holds 11 counters, r of them red. Two are taken without replacement and P(both red) = 28/55. Work out r.
- 4Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 3, 0.5, 2, 1. Which class contains the median?
- 5Bounds3 marks
A rectangle is 21 cm by 24 cm, each correct to the nearest cm. Work out the upper bound of its area.
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