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Q: Is 8.9 a rational number

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89 is a rational number.

No

Any other rational number.

Any number that can make a fraction with whole numbers on top and bottom is rational. 89 is a whole number, and so is ' 1 ', so it looks like you've nicely succeeded in defining a rational number.

44/50, 89/100

No, 8.9 is a rational number because it can be expressed as a fraction in the form of 89/10

It is a rational number

yes

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

89 is an integer and not a fraction. However, it can be expressed in rational form as 89/1. You can then calculate equivalent rational fractions if you multiply both, its numerator and denominator, by any non-zero integer.

As much as, in these days of uncertainty, anything can be anything. As long as the constraints of a rational number are kept to, a rational number will always remain a rational number.

It must be a generalised rational number. Otherwise, if you select a rational number to multiply, then you will only prove it for that number.

A rational number which is an integer can be simplified to a form in which the denominator is 1. That is not possible for a rational number which is not an integer.

Yes, but only if the rational number is 0.

Only if the rational number is 0.

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

It is a rational number.

-8 is a rational number

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 10 which is a rational number.

1.96 is a rational number

The number 3 is a rational number (as is any integer).

Yes. Any rational number divided by any other rational number is a rational number.

Yes, the sum is always rational.

It is rational. An irrational number is a number that you cannot define by a fraction or a decimal. Since you wrote it as a decimal, it is rational.