13. randy is putting bricks around the outside of his round flower bed to protect the plants.

a. if the diameter of his flower is 100in, what is the distance around the garden?
(c/d =3.14

b. if the curved bricks, he wants to buy are each half a foot long, how many will he need to put around the outside of the garden? explain

c. if each brick cost $0.68, and he can only buy whole blocks, how much will it cost him to get the material to put around the outside of his garden?

d. if his mother decides, he can only have half of that diameter of his flower bed, how will the cost of the bricks be affected? explain?