How can you use models to find volume?

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83