Foundation Plus
2nd September 1980
- 1Changing the Subject of a Formula3 marks
Make x the subject of y = 5x^2 - 7.
- 2Compound Interest and Depreciation3 marks
£1900 is invested at 2% compound interest per year. Work out the value after 3 years, to the nearest penny.
- 3Similar Shapes (Area and Volume)3 marks
Two similar shapes have lengths in the ratio 1 : 3. The smaller has an area of 21 cm^2. Work out the area of the larger.
- 4Probability (Higher)3 marks
A biased coin lands on heads with probability 0.4. It is thrown 100 times. How many heads would you expect?
- 5Averages from Frequency Tables3 marks
In a survey 5 households own 1 car, 3 own 2 cars and 7 own 3 cars. Work out the mean number of cars, to 2 decimal places.
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