Can someone explain how tod these math problems

1.  First, let's find out how big the square is:



Now let's find the area of the circle:



Now to find what area is left after removing the circle, all you have to do is subtract!



2.  Do the same exact thing, but instead of finding the area inside of a square and subtracting a circle, find the area of the circle and subtract a triangle.

3.  Once again, do the same thing.  Find the area of the big circle and subtract out the area of the smaller circle.

The answer to #44 is 10.4444, so g is the answer i divided the time by the miles. 47

The volume is 2212m cubed