Help me i need the help so much

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?

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.