How do I complete the chart or what do I gotta put in it??

What could explain what happened when the time was equal to 120 minutes

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?