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125 cubes since the little cubes are all 1 volume you can just say the normal volume.
Answer is 7.
55+5X=90
5X=90-55
5X=35
X=35/5
X=7
the end behavior of the function f(x)
the function f(x) must has odd number of roots ( where the graph of a function intersects the x-axis
the width cant be negative so the width of the rectangle would be 8 inches