Find the square root of $4.2025$

2.05

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2.08

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3.01

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2.09

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Solution

The correct option is A $2.05$
$T h e n u m b e r 4.2025 c a n b e w r i t t e n a s 42025 * 10^{- 4} P r i m e f a c t o r i z a t i o n 42025, 42025 = 5 * 5 * 41 * 41 = 5^{2} * 41^{2} S q u a r e r o o t o f 42025 = 5 * 41 = 205, S q u a r e r o o t o f 42025 * 10^{- 4} = 205 * 10^{- 2} = 2.05$

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