16.2 because when you times 9 with 9 you get 81.
After that you divide 81 by 5 and you get 16.2
least from greatest
-2.1, -2, 1/11, 2
It should be a whole number.
The shape that is generated is a Cone.
A triangle, when rotated about one of it's side will generate a solid in a form of a Cone. The cone could be a hollow one or a solid filled one, depending on the properties of the triangle being rotated.