Algebra-2

1. Determine the direct variation relationship:

   - Since the volume (V) varies directly as the cube of the radius (r), we can express this as , where is the proportionality constant.

2. Find the proportionality constant :

   - Given that a tank with a radius of 9 ft holds 2916 ft³ of water. Substituting these values into the equation gives .

   - Calculate . Thus,