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September 1, 2014

Homework Help: math

Posted by Jin on Wednesday, August 11, 2010 at 3:13pm.

An open box is to be made from a flat piece of material 18 inches long and 2 inches wide by cutting equal squares of length xfrom the corners and folding up the sides.
Write the volume Vof the box as a function of x. Leave it as a product of factors, do not multiply out the factors.
V=

If we write the domain of the box as an open interval in the form (a,b), then what is a=?
a=
and what is b=?

I got V=x(18-2x)(2-2x)
and a=0
b=9

but it says that its not correct

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