yes
The answer to the question that is given is 344444444/1000000000. This simplifies to 86111111/250000000.However, if your original number was meant to be 0.344... recurring, the answer is 31/90.
Yes.
yes
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.
Since it can be written as a fraction (9.0 = 90/10), then it 9.0 is a rational number.
No.
No.
It is a rational number. It can be written as a fraction.
-90 squared is rational - it is +8100. All perfect squares are not only rational but they are integers.
yes
Is 12.05 a rational number or irrational number?
1.96 is a rational number
It is a rational number, as it can be written as a fraction.
No, it is not.
Yes, the sum is always rational.
There is no such thing as a number that is both rational and irrational. By definition, every number is either rational or irrational.