Which list contains ONLY rational numbers?

Answer:
B. [tex]0.4166\overline{6}[/tex], [tex]\sqrt{81}[/tex], [tex]\frac{1}{8}[/tex].
Step-by-step explanation:
We are asked to find the list that contains only rational numbers.
We know that a number is known as rational, when it can be expressed as a fraction.
Upon looking at our given choices, we can see that option B is the correct choice.
In [tex]0.4166\overline{6}[/tex], the digit 6 has a bar on it, this means that it is repeating. We know that a repeating decimal is a rational number.
[tex]\sqrt{81}=9[/tex]. We can represent 9 as a fraction: [tex]\frac{9}{1}[/tex].
[tex]\frac{1}{8}[/tex] is already written as a fraction, therefore, it is a rational number.