For example, if the number line is like this,
---------28-29-30-31-32-33-34-35
You find 34 on the number line, then count down to 28-which is 6, so 34-28=6
Check the picture below.
liquid always take the shape of the container that contains it, so 25 cm³ from a beaker or pitcher or a curvy pipe dumped into another container, will always have 25 cm³ as its volume.
In this case it went from the cylinder to a prism, same 25 cm³.
notice in the picture, the volume of a green cube with those dimensions is just 1 cm³.
20x^3 + 15x....factoring out 5x
5x(4x^2 + 3)
Why cant you figure it out your self they arent thet hard