1\(\frac{1}{9}\)
1\(\frac{4}{9}\)
9
11
Correct answer is C
I = \(\frac{PRT}{100}\)
where r = r% p.a; I = 0.36p
0.36p = \(\frac{P \times r \times 4}{100}\)
\(\frac{0.36 \times 100}{4}\) = r
r = 9
Simplify \(\sqrt{50} + \frac{10}{\sqrt{2}}\)
10
10\(\sqrt{2}\)
20
20\(\sqrt{2}\)
Correct answer is B
\(\sqrt{50} + \frac{10}}{\sqrt{2}} = \(\frac{\sqrt{50}}{1} + \sqrt{10}{\sqrt{2}}\)
= \(\frac{\sqrt{50 \times 2} + 10}{\sqrt{2}}\)
= \(\frac{\sqrt{100} + 10}{\sqrt{2}}\)
= \(\frac{10 + 10}{\sqrt{2} = \frac{20}{\sqrt{2}}\)
= \(\frac{20}{\sqrt{2}}\) \times \frac{\sqrt{2}}{\sqrt{2}}\)
= \(\frac{20\sqrt{2}}{2}\)
= 10\(\sqrt{2}\)
Find the product of 0.0409 and 0.0021 leaving your answer in the standard form
8.6 x 10-6
8.6 x 105
8.6 x 10-4
8.6 x 10-5
Correct answer is D
0.0409 x 0.0021 = 409 x 10\(^{-4}\) x 21 x 10\(^{-4}\)
= 409 x 21 x 10\(^{-4 * -4}\)
= 8589 x 10\(^{-8}\)
= 8.589 x 10\(^{3}\) x 10\(^{-8}\)
= 8.6 x 10\(^{3-8}\)
= 8.6 x 10\(^{-5}\)
Evaluate \(\frac{(3.2)^2 - (4.8)^2}{3.2 + 4.8}\)
-0.08
-1.60
-10.24
-12.80
Correct answer is B
\(\frac{(3.2)^2 - (4.8)^2}{3.2 + 1.8} = \frac{(3.2 - 4.8)(3.2 + 4.8)}{(3.2 + 4.8)}\)
= 3.2 - 4.8
= -1.60
If x% of 240 equals 12, find x
x = 1
x = 3
x = 5
x = 7
Correct answer is C
x% of 240 = 12
\(\frac{x}{100} \times 240 = 12\)
x = \(\frac{12 \times 100}{240}\)
x = 5