Question

Which number is a rational number?

Answer 1

Rational numbers can not be a square root, therefore options A and D are incorrect.
Rational numbers also can include terminating decimals, and because Choice B continues on and doesnt stop, it is also incorrect.
This leaves choice C as the correct answer.

Answer 2

17.156

Explanation:

Rational number is a number that can be written as a ratio of two integers (or can be expressed as a fraction). Only 17.156 can be written as a ratio of integers: 17 + 156

1000