Write the surface area S of a cube as a function of the length x of one of its edges, and use it to find the surface area (in square inches) when x = 5 x = 5 x = 5 inches.A) S ( 5 ) = 25 S ( 5 ) = 25 S ( 5 ) = 25 square inchesB) S ( 5 ) = 750 S ( 5 ) = 750 S ( 5 ) = 750 square inchesC) S ( 5 ) = 30 S ( 5 ) = 30 S ( 5 ) = 30 square inchesD) S ( 5 ) = 100 S ( 5 ) = 100 S ( 5 ) = 100 square inchesE) S ( 5 ) = 150 S ( 5 ) = 150 S ( 5 ) = 150 square inches

Question

Write the surface area S of a cube as a function of the length x of one of its edges, and use it to find the surface area (in square inches) when   x = 5 x = 5 x = 5   inches.A)    S ( 5 )  = 25 S ( 5 )  = 25 S ( 5 )  = 25   square inchesB)    S ( 5 )  = 750 S ( 5 )  = 750 S ( 5 )  = 750   square inchesC)    S ( 5 )  = 30 S ( 5 )  = 30 S ( 5 )  = 30   square inchesD)    S ( 5 )  = 100 S ( 5 )  = 100 S ( 5 )  = 100   square inchesE)    S ( 5 )  = 150 S ( 5 )  = 150 S ( 5 )  = 150   square inches

Jolina Santos · Accepted Answer

Final Answer : E, Explanation :   The surface area   S S S   of a cube as a function of the length   x x x   of one of its edges is given by   S ( x ) = 6 x 2 S(x) = 6x^2 S ( x ) = 6 x 2  . Substituting   x = 5 x = 5 x = 5   inches, we get   S ( 5 ) = 6 × 5 2 = 6 × 25 = 150 S(5) = 6 	imes 5^2 = 6 	imes 25 = 150 S ( 5 ) = 6 × 5 2 = 6 × 25 = 150   square inches.

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