Question

Which of the following numbers is rational? Assume that the decimal patterns continue.

Answer 1

`√(49)`

Explanation:

Define a rational number by a number able to expressed a fraction where the denominator is not 0 or 1.

Non-terminating (never-ending) decimals cannot be expressed as a fraction and therefore are irrational. However, recall that
`√(49)=7`, which can be expressed as a fraction (e.g.
`(14)/(2)`, etc). Thus, the answer is
`\boxed{√(49)}`.