Daily Practice - Higher Plus
16th March 1995
- 1Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 0.4, one 10 units wide with density 0.6. How many values in total?
- 2Surds3 marks
Simplify sqrt(50) + sqrt(50), giving your answer in the form a sqrt(b).
- 3Inverse and Composite Functions3 marks
f(x) = 5x - 12. Work out the inverse function f^-1(x).
- 4Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 5, y = 175. Work out the positive value of x when y = 28.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 15 cm by 10 cm by 10 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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