Question

What subset does 8.1 pi belong to

Answer 1

It's going to be Irrational

Answer 2

`8.1\pi` is an irrational number.

Explanation:

We are asked to find the subset to which 8.1 pi belongs.

We know that
`\pi` is an irrational number. We also know that the product of any non-zero rational number and an irrational number is always irrational.

We can see that 8.1 is a non-zero rational number.

Therefore,
`8.1\pi` is an irrational number.