What subsets of real numbers does 9.76472019... Belong?

Question

I'm a pre algebra student so I need an answer I can understand

Answer 1

This number is an integer, 9, and a decimal, .76472019... .

The decimal part does not end. This is represented by the three dots, ... .

The decimal part does not have a part that repeats, like 0.27272727...

 

A non-terminating, non-repeating decimal is an irrational number.