Since 7² = 49 and 8² = 64, the missing number is between 7 and 8.
Hey there!
Let's write this equation :
49 < x²(blank) < 64
This would be become :
7 < x < 8
Now, we know the number is between 7 and 8.
√56 = 7.5
Hence, we know 7.5 is between 7 and 8
Hope my answer helps!!
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