The local library asked Reese's art class to paint a mural on a wall of the library. For the background, they painted a large square and used enough paint to cover 70ft. How long is one side of the square rounded to the nearest whole number?

Question

anonymous · Answer

My options are 6,7,8,9

pfenn1 · Answer

Do you mean that they used enough paint to cover 70 square feet?

anonymous · Answer

Yes

pfenn1 · Answer

Do you know how to find the area of a square?

anonymous · Answer

by multiplying the base by itself?
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pfenn1 · Answer

Correct.  A square has 4 sides that are equal in length, let's call it x?  So "by multiplying the base by itself", we get x times x = area or x^2 = area. So solve for x.

anonymous · Answer

So it would be 70^2?

pfenn1 · Answer

No.  The total area is 70 sq ft so$$x ^{2}=70$$$$x=\sqrt{70}$$

anonymous · Answer

its about 8 right??