Daily Practice
Higher
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17th March 1980
- 1Surds2 marks
Write sqrt(98) in the form a sqrt(b), where b is as small as possible.
- 2Drawing Quadratic Graphs2 marks
For the curve y = x^2 + 7x - 5, work out y when x = -2.
- 3Repeated Percentage Change3 marks
A price rises by 10% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.
- 4Sector Areas and Arc Lengths3 marks
A sector of a circle has radius 12 cm and angle 240°. Work out its area, to 1 decimal place.
- 5Conditional Probability3 marks
9 students study Spanish and 5 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
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