Question

Which is a rational number?

A.


B.


C.


D.

Answer 1

\[A. \sqrt{8}\]

Answer 2

nope, \[\sqrt{8}=2\sqrt{2}\] and \[\sqrt{2}\]is irrational

Answer 3

\[B. \sqrt{16}\]

Answer 4

in fact \(\sqrt{a}\) is always irrational UNLESS \(a\) is a perfect square,
like for example 16

Answer 5

\[C.\sqrt{18}\]

Answer 6

\[D.\sqrt{20}\]

Answer 7

16 i believe

Answer 8

thank you

Answer 9

wellcome~