How much helium will it take to fill a 6 foot balloon?

To determine how much helium is needed to fill a 6-foot balloon, we first need to calculate its volume. A 6-foot balloon has a diameter of about 6 feet, giving it a radius of 3 feet. The volume of a sphere can be calculated using the formula ( V = \frac{4}{3} \pi r^3 ), which results in approximately 113.1 cubic feet. Therefore, it would take roughly 113.1 cubic feet of helium to fill the balloon completely.