Question

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Answer 1

Answer:

$403 + 40\sqrt{3}~~ ft^2$

Step-by-step explanation:

$(20+\sqrt{3})(20+\sqrt{3}) = 20^2 + 2\cdot 20 \cdot \sqrt{3} + \sqrt{3}^2 = 400 + 40\sqrt{3} + 3 = 403 + 40\sqrt{3}$