Question

Please Help me!!!!!!!!!!!!

Answer 1

D. 69 in.²

Explanation:

`{a}^(2) + 2a \sqrt{\frac{ {a}^(2)}{4} + {h}^(2)} = S. A.`

`{3}^(2) + 2(3) \sqrt{ (9)/(4) + (10)^(2)} = 9 + 6[(1(1)/(2)) + 10] = 9 + 69 = 78 \\ \\ 78 ≈ 69`

So, what happened here was that whenever you have squares under the radical, you undo the square root, causing the radical to vanish, so with that, you have your answer.

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