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Question #63d55

1 Answer

Aug 18, 2016

#sqrt77 " lies between " 8 and 9#

Explanation:

Let's look at the perfect squares which are close to 77.

#64 = 8^2 and 81 = 9^2#

#sqrt64 < sqrt77 < sqrt81#

#8 < sqrt77 < 9#

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