Question

plz solve this....plz plz plz ......

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Answer 1

Answer:

Option 1 is right means root 4 by 9..

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Answer 2

Explanation:

a)

$\sqrt{ \frac{4}{9} } = \frac{2}{ 3} \\ so \: it \: is \: rational$

$b) \: \sqrt{ \frac{12}{3} } = it \: is \: not \: a \: square \: of \: any \: number \: so \: it \: is \: irrational$

$c) \sqrt{7} = irrational$

$d) \: \sqrt{81} = rational \: because \: 81 \: is \: a \: square \: of \: 9$

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