Algebra-2

1. Determine the direct variation relationship:

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

2. Find the proportionality constant k:

   - Given that an aquarium with a radius of 4 ft holds 64 ft³ of water. Substituting these values into the equation gives .

   - Calculate . So,

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