Simplify 0.63954 ÷ 0.003 giving your answer correct to two significant figures
213.18
213.00
213
210
21
Correct answer is D
= \(\frac{0.63954}{0.003}\)
moving the decimal places, we have
= \(\frac{639.54}{3}\)
= 213.18
\(\approxeq\) 210 (to 2 s.f.)
Cos x is negative and sin x is negative.Which of the following is true of x?
0o < x < 90o
90o < x <180o
180o < x < 270o
270o < x <360o
-90o < x <90o
Correct answer is C
In the 3rd quadrant, only the tan of angles are positive.
The 3rd quadrant = 180° < x < 270°
If log\(_{10}\) q = 2.7078, what is q?
5102
849.9
510.2
84.99
51.02
Correct answer is C
q = 10\(^{2.7078}\)
Antilog of 2.7078 = 510.2
What value of k makes the given expression a perfect square ? m\(^2\) - 8m + k = 0
2
4
8
16
64
Correct answer is D
Take half the coefficient of m and square it
=> (-8/2)2 = k = 16
Find the root of the equation 2x\(^2\) - 3x - 2 = 0
x = -2 or 1/2
x = -2 or1
x = -2 or 2
x = -1 or 2
x = -1/2 or 2
Correct answer is E
2x\(^2\) - 3x - 2 = 0
2x\(^2\) - 4x + x - 2 = 0
2x(x - 2) + 1(x - 2) = 0
(2x + 1)(x - 2) = 0
x = \(\frac{-1}{2}\) or x = 2