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Please show how you did this. Thx

Please show how you did this. Thx-example-1

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Answer: D
So the total area is 78 ft^2. Area is two of the sides multiplied together, and since the shape is a square the sides are the same length. To solve this you take the square root of 78. The answer is 8.83176... so you round it to 8.8
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