Question

You gotta look at the picture and look at the questions they asked

Answer 1

The figure

$\sqrt[]{81}$

Is a rational number because it simplifies to give 9 i.e

$\sqrt[]{81}=9$

A rational number is a number that can be expressed in the form of a quotient or division of two integers, i.e. p/q, where q is not equal to 0

And since

$\sqrt[]{81}=\frac{9}{1}$

Hence, the right option is d