Higher Plus
25th February 1988
- 1Vectors Proof Questions3 marks
In a vector proof you find that vector PQ = 6a - 3b and vector RS = 30a - 15b. What does this show about PQ and RS?
- 2Probability Equation Questions3 marks
The probability of winning a game is 4/5. A player expects 8 wins. How many games did they play?
- 3Histograms3 marks
A histogram has two bars: one 5 units wide with frequency density 0.4, one 10 units wide with density 0.6. How many values in total?
- 4Surds3 marks
Simplify sqrt(45) + sqrt(245), giving your answer in the form a sqrt(b).
- 5Trigonometric and Exponential Graphs2 marks
The curve y = cos x° is drawn for 0 <= x <= 360. Write down the value of y when x = 180.
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