Which triangle is conguent to ABC

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

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What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)