One type of stone formation found in Carlsbad Caverns in New Mexico is called a column. This stone formation connects to the ceiling and the floor of a cave.

a. What is the radius (to the nearest tenth of a foot) of a cylindrical column that has a circumference of 7 feet? 8 feet? 9 feet?

8ft =Radius of (approx) ≈1.274

7ft = Radius of ≈1.114

C=2pir

7=2pir

7/3.14=2r (diameter)

2.229/2 =r

1.114 =r

8ft= Radius of ≈1.274

9ft= Radius of ≈1.433