Question 19 • Algebra II
Use s = √(SA ÷ 6) for each cube. For 1,200 square inches, the side length is √200 = 10√2 inches; for 768 square inches, it is √128 = 8√2 inches. The difference is 10√2 − 8√2 = 2√2 inches, so the correct choice is 2√2 in.
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