Question

Please help me I really really need help

Answer 1

`B) √(2)` ÷
`2√(5)`

Explanation:

`A`→
`2√(5)` ÷
`√(5)`

`= (2√(5) )/(√(5) )`

→ 2 is a rational number

`B)` →
`√(2)` ÷
`2√(5)`

`=(√(2) )/(2√(5) )`

`=(√(2) )/(√(2)*√(2)*√(5) )`

`= (1)/(√(10) )`

↑ is irrational number

`C)`
`(\pi )/(2)`÷
`\pi`

`= (\pi )/(2) *(1)/(\pi )`

`=(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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