Question

Solve the equation. First estimate using the perfect square closest to 78 . Then use a calculator. Estimate. n2=78 (the 2 is meaning squared)

Answer 1

n = 8.8

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Work below!

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My estimate: 8.8 x 8.8 = 77.44

Calculated answer: 8.8 x 8.8 = 77.44

Why are they the same? Because 78 is simply not a perfect square. Therefore 77.44 must be rounded up to 78.

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Good luck! :)

~pinetreee