Algebra-2

1. Establish the direct variation relationship:

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

2. Determine the proportionality constant :

   - Given that a pool with a radius of 5 ft holds 250 ft³ of water. Substituting these values into the equation gives .

   - Calculate . Thus,