eyeglass case in the shape of a rectangular prism the volume of the case is 4 / 125 cubic foot how many cubic blocks with a side length of 1/5 cute foot would be​

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?

Can someone answer this question for me

Write the factored form of this trinomial 9x^2+18x-7