If it can be expressed as a fraction then it is rational if not then it is irrational
Some square roots are rational, some are irrational (and some are not even real).
If it can't be expressed as a fraction then it is an irrational number
Because the square root of it is an irrational number
It isn't always possible to determine. For example, it is unknown whether the Euler-Mascheroni constant (0.5772156649...) is rational or irrational.Most famous numbers and constants are known to be rational or irrational. If it can be expressed as a fraction a/b where a and b are integers, it's rational.
Irrational. Irrational. Irrational. Irrational.
It is irrational.
Rational
Such a sum is always irrational.
If it says "negative irrational", then obviously it is irrational.
No
The square root of 94 is an irrational number