Question

Please help me I really really need help

Answer 1

Answer:

$B) \sqrt{2}$ ÷ $2\sqrt{5}$

Step-by-step explanation:

$A$→ $2\sqrt{5}$ ÷ $\sqrt{5}$

$= \frac{2\sqrt{5} }{\sqrt{5} }$

→ 2 is a rational number

$B)$ → $\sqrt{2}$ ÷ $2\sqrt{5}$

$=\frac{\sqrt{2} }{2\sqrt{5} }$

$=\frac{\sqrt{2} }{\sqrt{2}*\sqrt{2}*\sqrt{5} }$

$= \frac{1}{\sqrt{10} }$

↑ is irrational number

$C)$ $\frac{\pi }{2}$÷ $\pi$

$= \frac{\pi }{2} *\frac{1}{\pi }$

$=\frac{1}{2}$

↑ is a rational number

$D)$$5\pi$ ÷ $\pi$

$= 5$

↑ is a rational number

So, Option B is your answer

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hope it helps..

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