Foundation Plus
30th November 1970
- 1Changing the Subject of a Formula3 marks
Make x the subject of y = 6x^2 - 9.
- 2Repeated Percentage Change3 marks
A town's population is 6500 and grows by 6% each year. Work out the population after 3 years, to the nearest whole number.
- 3Similar Shapes (Area and Volume)3 marks
Two similar shapes have lengths in the ratio 1 : 3. The smaller has an area of 25 cm^2. Work out the area of the larger.
- 4Probability (Higher)3 marks
A biased coin lands on heads with probability 0.2. It is thrown 250 times. How many heads would you expect?
- 5Averages from Frequency Tables3 marks
In a survey 9 households own 1 car, 9 own 2 cars and 3 own 3 cars. Work out the mean number of cars, to 2 decimal places.
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