<PRE><B>Question 1147993</B>
a rectangular box has a volume of 100 cubic units.  if the base has a length four units longer than its width and X is the width write an expression for the surface area.
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Vol = W*L*H = 100
Vol = X*(X+4)*H = 100
H = 100/(X^2 + 4X)
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SA = 2*(X*(X+4) + X*H + H*(X+4))
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You can sub for H.
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