Answers:
Square root of 66 is between 8 and 9
It is closer to 8
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Explanation:
Note that 66 is between the perfect squares 64 and 81
So we can say the following:
[tex]64 < 66 < 81\\\\\sqrt{64} < \sqrt{66} < \sqrt{81}\\\\8 < \sqrt{66} < 9[/tex]
Meaning the square root of 66 is between the integers 8 and 9.
The decimal approximation of 8.12 helps confirm this (because 8.12 is between 8 and 9).
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[tex]\sqrt{66}[/tex] is closer to 8 than it is to 9 since 66 is closer to 64, than 66 is to 81.
Also, we're told that [tex]\sqrt{66} \approx 8.12[/tex] giving us more proof that [tex]\sqrt{66}[/tex] is closer to 8.