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## 2yoututu11 Group Title Which is a rational number? A. B. C. D. 2 years ago 2 years ago

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1. 2yoututu11

$A. \sqrt{8}$

2. satellite73

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

3. 2yoututu11

$B. \sqrt{16}$

4. satellite73

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

5. 2yoututu11

$C.\sqrt{18}$

6. 2yoututu11

$D.\sqrt{20}$

7. BriannaD

16 i believe

8. 2yoututu11

thank you

9. BriannaD

wellcome~