No, because it is a rational number that can be expressed as a fraction in the form of 3/4
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No, irrational numbers cannot be written in the form of a/b. 75 can be written as 75/1
The square root of 75 is an irrational number
Yes.
It is a rational number because it can be expressed as a fraction in the form of 75/1
No. The square root of most numbers is irrational - only if the number of which you take the root happen to be perfect squares, do you get a rational root. In this case, to take the square root of 3/4, 3 is not a perfect square, so the root is not rational. Or you can take .75 to be 75/100; once again, 75 is not a perfect square, so the root is irrational.