6.8m
14.5m
17.7m
34.3m
Correct answer is B
Sin 65o = \(\frac{x}{16}\)
x = 16x sin 65
= 16 x 0.9063
x = 14.5m
Simplify \(\frac{20}{5\sqrt{28} - 2 \sqrt{63}}\)
\(\frac{5\sqrt{7}}{7}\)
\(\frac{5\sqrt{5}}{7}\)
\(\frac{7\sqrt{5}}{7}\)
\(\frac{7\sqrt{7}}{5}\)
Correct answer is A
\(\frac{20}{5 \sqrt{4 \times 7} - 2\sqrt{9 \times 7}}\)
\(\frac{20}{10 \sqrt{7} - 6\sqrt{7}}\)
= \(\frac{20 \sqrt{7}}{4 \sqrt{7}}\)
= \(\frac{5\sqrt{7}}{7}\)
-6oC
-4oC
4oC
8oC
Correct answer is B
Temperature = -5oC
It fell by 6oC = -5oC - 6oC
= -11oC
Then rose by 7oC = -11 + 7
= -4oC (final temperature)
Which of the following is not a measure of centre tendency?
mean
mode
range
median
Correct answer is C
No explanation has been provided for this answer.
30m2
57m2
120m2
225m2
Correct answer is C
Area of carpet = 2.5 x 2.4 = 6
Let F represent the floor
6 = 5% of F
6 = \(\frac{5}{100}\) x F
5F = 6 x 100
F = 6 x \(\frac{100}{5}\)
= 120m2