No, it is rational.
The square root of 121 is 11 which is a rational number and it is also a prime number
15.125 is a rational number because it can be expressed as a simple fraction, 121/8
no, because the root of a number that isn't a perfect square is irrational
If the product of two irrationals is a rational, then they are both the same radical of a non-perfect square. For example, radical 5 times radical 5 is 5, since that is by definiton what a radical is.
Rational
No, they are rational.
No, it is rational.
Integers are rational numbers.
The square root of 121 is 11 which is a rational number and it is also a prime number
If the value applied in the radical is not a perfect square, it is irrational. 25; 400; and 625 are perfect squares and are rational when applied in a radical.
No. Radical(9) is +3 or -3, both of which are rational.
No. Radical(1.21) = 1.1, for example, is rational.
No, because 11 squared is 121 which is a rational number
No it is not. It is not irrational either but is an "imaginary" number.
15.125 is a rational number because it can be expressed as a simple fraction, 121/8
Sqrt(4) is +/- 2 so it is rational, not irrational. The question, therefore, makes no sense.