Question

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

Answer 1

Answer:

$\sqrt{49}$

Step-by-step 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 $\sqrt{49}=7$, which can be expressed as a fraction (e.g. $\frac{14}{2}$, etc). Thus, the answer is $\boxed{\sqrt{49}}$.