You are correct
6 sides, s<span>um of i</span><span>nterior angles = 720</span>
The radius r used in below equations would equal 2in because it is half the given diameter of 4in.
The volume of the cone would be

The volume of a cylinder with the same dimensions would be

The cylinder is 24 - 8 = 16 cubic inches greater.
9) -2
10) 8
11) $3.17, y= 0.17x+3