When it can be expressed as a fraction
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.
If the whole number is a perfect square, its square root is rational. If not, it's not.
It is not possible to tell. There is no recurring pattern that can be discerned.
It is irrational.
It is a rational number. It can be written as a fraction.
yes
Is 12.05 a rational number or irrational number?
1.96 is a rational number
If the number inside the radical is a perfect square or a ratio of perfect squares.
It is a rational number, as it can be written as a fraction.