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It is an irrational number
98 is the ratio of 98 to 1. So it's a rational number.
It is rational because it can be written as a ratio of two integers where the denominator is not zero. The number 98 can be written as 98/1.
No because the square root of 98 is 7 times the square root of 2
The simplified square root of 98 is: ±9.9 or ±10