Calculus
posted by Monique .
An open box is to be made from cutting squares of side "s" from each corner of a piece of cardboard 25" by 30".
Write an expression for the volume, V, of the box in terms of s.
I have no idea where to start on this. I know V=lwh (length*width*height), but what about "s" and the 25x30 piece? I'm so confused. Help please?
Thank you so much! :)

Isn't height s? and length 302s, and width 252s?
Draw a figure and see. 
25x2+ 30x
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