Q: Is radical 121 rational or irrational?

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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

It is rational number because 2.20% is the same as 0.022 which as a fraction in its lowest terms is 11/500 and only rational numbers can be expressed as fractions.

Related questions

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.