it all depends on the player. can you shoot? can you skate? what level are you playing at? some people are very good players and do not score very many goals. you will have a better chance if you practice the aim of your shot and practice shooting on goalies.
i think in order to do this you might need to use a graph first. that is the way i learned it in school.
since the volume of gas and the cube of its radius vary directly, we can set up an initial equation to find the constant of variation:
v = kr³, where v=volume, r=radius and k=contant of variation
given that a balloon with a radius of 3 inches can hold a volume of 81 cubic inches, we can plug these values into the equation and solve for 'k':
81 = k3³ or 81 = 27k or k = 3
given 'k', now we can find the volume of the balloon with a radius of 2:
v = (3)(2³) = 24 in³
since the question asked how much gas must be released to reduce the radius, we would find the difference of 81 and 24:
81 - 24 = 57 in³
300 * 0.15 = 45
((btw, giving brainiest to whoever can...