You can put this solution on YOUR website! The surface area of a cube is 150 mm exponent 2.
Find it’s [sic] volume. Include all units.
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SA = 6s^2 ---- 6 squares with side lengths of s
6s^2 = 150 mm^2
s^2 = 25
s = 5 mm
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Volume = s^3 = 125 mm^3
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it's = it is
"its" is possessive