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1. Simplify
0.00275x0.0081, leaving your answer
0.0025+0.09
in standard form.
2. Three points P, Q and R are in the same plane in a
field, /PQ/25cm, /PR/-24cm and 4QRP=90º.
Calculate /QR/
3. A pair of unbiased dice are thrown together. Find
the probability that the sum of the outcome is:
(a) a total score of 7;
(b) the same number,
(c) at least 8.
4. The following table gives the frequency distribu-
tion of the scores obtained in a dictation test by a
group of students in a class.
Mark
Frequency
0-4
1
5-9
5
10-14
7
15-19
13
20-24
11
25-29
9
30-34
4
Use the information to answer the following questions.
(a) Find the mode of the distribution...
(b) What is the median of the distribution.
(c) Calculate the mean of the distribution.
5. If tan x=
3.
find cos x-sin x, such that
0°≤x≤ 900
Part 2:
(Answer any 5 questions)
6. (a) If tan x= 24. where 0°≤x≤ 90°, find cos x.
(b)
P
20cm
300
15cm
R
In the diagram above, QR-15cm, |PR-20cm
and APRQ 30°. Calculate the area of the
triangle.
​

Sagot :

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