Yes.
A perfect square is a square of an integer.The set of integers is closed under multiplication. That means that the product of any two integer is an integer. Therefore the square of an integer is an integer.Integers are rational numbers so the square [which is an integer] is a rational number.
All positive integers which are not perfect squares.
It does not matter! There are more numbers that are not perfect squares than there are perfect squares and the universe has not ground to a screeching halt!
No. Lots of square roots are not rational. Only the square roots of perfect square numbers are rational. So for example, the square root of 2 is not rational and the square root of 4 is rational.
It is a rational number - as are ALL perfect squares.
Yes.
-90 squared is rational - it is +8100. All perfect squares are not only rational but they are integers.
No. 1.5^2 = 2.25 is rational.
Yes, they are.
No. The square roots of perfect squares are rational.
No. 2.25 is not a perfect square but it is rational.
yes it can All perfect squares are rational numbers as the definition of a perfect square is a number which is the product of an integer with itself. An integer is a rational number, and multiplying an integer by an integer produces another integer.
That isn't possible. Rational numbers either terminate or have a repeating pattern, and irrational numbers are all the rest. Perfect squares terminate, therefore they are rational.
Yes. In fact, they are integers.
They are perfect squares.
Yes. Not only that, they are counting numbers.