Answer:
6.35
Explanation:
7 divided by 20 is 0.35+6= 6.35
There's a couple ways to do this. These look like special triangles to me. Which should be the 30 60 90 triangle's which have the same ratios for their legs. The legs will always be square root three and one and the hypotenuse of two - I can't see what I'm typing for some reason so I will finish in a comment
A proportional relationship is just a linear relationship where b = 0, or to put it another way, where the line passes through the origin (0,0).
We know, volume of a Cube = Edge³
In short, Your Equation would be: v = f³
Hope this helps!