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Can someone help me with this please? And can you explain why that answer is right

Can someone help me with this please? And can you explain why that answer is right-example-1

1 Answer

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i believe it's c. √21 because when you simplify the square root, you get 4.5825 and so forth and in the number line, it's almost close to 5.

hope that helps, God bless!
User Ashtav
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