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81 is rational. Rational numbers are numbers that can be written as a fraction. Irrational Numbers cannot be expressed as a fraction.

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Q: Is 9 squared rational or irrational?

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It is a rational number as 9

Rational

28 squared is 784 which is a rational number

Rational.

Rational.

20 squared is 400 which is a rational number

No, it is rational.

No, it is rational.

Any number that can be written as a fraction is rational -- therefore, 4/9 squared is rational (it can still be written as a fraction even if you multiply it by itself).

Rational; 62 = 36. Any rational number that is squared is still rational.

They are rational.

Sometimes. eg the irrational number √2 squared is 2 which is rational (2 = 2/1) eg the irrational number √(√2) squared is √2 which is irrational.

-90 squared is rational - it is +8100. All perfect squares are not only rational but they are integers.

The square of any rational number is also rational.

No because pi still remains as an irrational when squared.

No because 102 squared is 10404 which is a rational number

9 is a rational number

The square of any rational number is also rational.

81*81 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

-9 is a rational number

9 is a rational number

The square root of 14 is irrational. Three squared is 9, and four squared is 16; so square root of 14 is in-between 3 and 4.

They are rational.

No because 25 is a rational number

No, it is rational.