There are infinitely many answers, eg:
Chat with our AI personalities
it is not irrational. This is because there are two non irrational numbers that divide each other that are rational. So 10.46 is rational.
Yes. sqrt(18)/sqrt(2) = 3*sqrt(2) / sqrt(2) = 3
If you add, subtract or multiply rational numbers, the result will be a rational number. It will also be so if you divide by a non-zero rational number. But division by zero is not defined.
No. 4 root 2 and 2 root 2 are both irrational. Divide the first by the second you get 2. Which is not a member of the set of irrational numbers.
No, because you cannot divide by zero.