You are a saint, Prove It.

For the first one. I don't see where 4 rectangles (x*h) and 2 (x*x) come from.

Isn't this how the diagram should look?

Theres a rectangular box with a volume of 60ft^3. Below it is a square base.

We set the sides of the square base to X since they are the same.

If we split the rectangle (as I did in the diagram with a thin brush) we can break it up into smaller pieces, but why 4?

I think i'm pretty confused about the diagram and where all the rectangles come from.

Reading the problem implies that there is only a rectangle and a square base, as my diagram shows.

Where do the come from

Ok for this part on the 3rd problem, it's 5x (the cost per foot of fencing adjacent to the street (x)) then + 3(x + 2y). This specifies that the 3x is conditional (every side that's not next to the street) but I don't see exactly how.

It would make sense that the 2y is cause we have two y sides (width) that need to be accounted for.