Question

Select the BEST classification for π. A) irrational B) rational C) imaginary D) not real

Answer 1

a

Explanation:

Answer 2

Well it's not really a matter of which is "best", one is right and the others are wrong :)

`\pi` is an irrational number, meaning that it can't be expressed with a fraction between integers: in other words, there doesn't exist two integers
`a,b` such that

`(a)/(b)=\pi`

This is why option B is wrong. Also, imaginary numbers (option C) are complex numbers with no real part. Since

`\pi = \pi + 0i`

`\pi` is not imaginary. Finally, irrational numbers are real numbers, so option D is wrong as well.