Which of the following are rational numbers?

Rational numbers are numbers that can be expressed as a fraction of two integers. Among the given options:

1. √30 is not a rational number because it is an irrational number.
2. 73.888... is not a rational number because it is a non-terminating, non-repeating decimal.
3. √1 is a rational number because it equals 1, which can be expressed as 1/1.
4. 44 is a rational number because it can be expressed as 44/1.

Therefore, the rational numbers are √1 and 44.