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Q: How can you tell a number is an rational number?

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Yes. You can tell because there is a finite number of decimal places. 0.91 = 91/100 which is a rational number.

You probably don't have to inspect that pair too closely.Every integer IS a rational number.

a rational number repeats but terminates.ex:3.333333333. a irrational number doesn't terminate or repeat itself. ex:3.334334433444.

It is not possible to tell. There is no recurring pattern that can be discerned.

If the whole number is a perfect square, its square root is rational. If not, it's not.

It is a rational number

It is a rational number. It can be written as a fraction.

yes

It is a rational number.

1.96 is a rational number

It is irrational.

Is 12.05 a rational number or irrational number?

It is a rational number.

9.0 is a rational number

you mean is a whole number a rational number? and yes it is and rational number. Any number that can be put in a fraction is a rational number

It is a rational number, as it can be written as a fraction.

Yes, the sum is always rational.

Yes, it is.

It is a rational number.

-8 is a rational number

Yes.

It is a rational number, not an integer.

Yes.

There is no such thing as a number that is both rational and irrational. By definition, every number is either rational or irrational.

It is rational number.