You can do 2 1/2 minus 1 1/8 to get 1 3/8. Your welcome and I hope you get a good grade
The first one is 8 and here's a graph. the second one is 5 again here's a graph
The first relation is a function, the others no
Answer:
V≈33.51
although I don't have an explanation, sorry, if you look up "how to find the volume of a sphere" on google, it will give you the answer