Two things to remember first remember that in the given eq: V=4/3piR^3 where r = radius So we know we just need to plug the given equation for radius. Where radius = 2x^3y^-4 V= 4/3pi(2x^3 * y^-4)^3 Remember the exponent rule: (a*b)^n = a^n*b^n Also remember the negative exponent rule X^-n = 1/x^n Now with this: V= 4/3 * pi(8x^9/y^12) V= 32pi*x^9/3y^12 Or A
