SOLUTION: the lenght of a shipping box is two inches longer than the width and four times the height.
write a fuction v(w) that models the volume of the box, where w is the width, in inches
The width is w inches,
the length is (w+2) inches,
the height is inches, according to the condition.
Hence, the volume is V(w) = ,
and you can simplify it further, if you want and/or if you need.