0.7901
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We can't tell where the parentheses are in the question,
so it can be interpreted in two different ways.
Here are the answers to both:
1). sqrt(64) / 81 = 8/81 = a very interesting decimal: 0.098765432098765432 (repeating)
2). sqrt(64/81) = sqrt(64) / sqrt(81) = 8/9 = 0.8888 (rounded, repeating)
The square root of any number between 64 and 81.The square root of any number between 64 and 81.The square root of any number between 64 and 81.The square root of any number between 64 and 81.
0.6049
There are infinitely many solutions:The square of 8 is 64.The square of 9 is 81. Therefore, the square root of ANY NUMBER between 64 and 81 is between 8 and 9.
8 and 9. 8 squared is 64. 9 squared is 81. 64 < 75 < 81, hence the square root of 75 is somewhere between 8 and 9.
81