Question

Please help me and explain

Answer 1

A number is rational if it can be written as a fraction. That would basically be any number that is terminating or is a whole number. However, numbers with repeating decimals are also rational numbers

Answer 2

Irrational Numbers. All numbers that are not rational are considered irrational. An irrational number can be written as a decimal, but not as a fraction. An irrational number has endless non-repeating digits to the right of the decimal point.

1. No (Is the multiples of Pi)
2.Yes
3. no
4. Yes