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Question 4
What is the value of $$\frac{1}{(0.1)^2} + \frac{1}{(0.01)^2} + \frac{1}{(0.5)^2} + \frac{1}{(0.05)^2}?$$
Solution
$$\frac{1}{(0.1)^2}+\frac{1}{(0.01)^2}+\frac{1}{(0.5)^2}+\frac{1}{(0.05)^2}$$
$$=\frac{100}{1}+\frac{10000}{1}+\frac{100}{25}+\frac{10000}{25}$$
$$=100+10000+4+400\ .$$
$$=10504\ .$$
A is correct choice.
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