Yes.
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√0.01 = √(1/100) = √12/√102 = 1/10 (which is a rational number)
The square root of 1 is 1, so the answer is yes.
A rational number is a number that can be expressed as a fraction. For example, the number 5 is a rational number because as a fraction it is 5/1. The number 0.5 is a rational number because as a fraction it is 1/2. The square root of 3 is not a rational number, as it can not be expressed as a simple fraction.
The square root of 16 is ±4 which is the rational number ±(4/1)
It is a negative integer, a rational, a real.