I am having difficulty solving for the volume of solids when only given an equation such as the ones I have provided. Also what is meant by "about the y-axis" or "about the x-axis". Any help on these problems would be greatly appreciated

8. [0/4 Points] DETAILS PREVIOUS ANSWERS MY NOTES Find the volume of the solid formed by rotating the region bounded by the given curves about the indicated axis of revolution. (Round your answer to two decimal places.) y = -|x - 3| + 3, y = 0; about the y-axis 197.92 X 9. [-/5 Points] DETAILS MY NOTES Find the volume of the solid formed by rotating the region bounded by the given curves about the indicated axis of revolution. (Round your answer to two decimal places.) y = -x2 + 7, x + y = 7; about x = 6 10. [-/5 Points] DETAILS MY NOTES Find the volume of the solid formed by rotating the region bounded by the given curves about the indicated axis of revolution. (Round your answer to two decimal places.) y = x2/3, y = x2; about y = -2 12. [0/5 Points] DETAILS PREVIOUS ANSWERS MY NOTES Find the volume of the solid formed by rotating the region bounded by the given curves about the indicated axis of revolution. y = _, y = 1, y = 2, x = 0; about the x-axis 13. [0/5 Points] DETAILS PREVIOUS ANSWERS MY NOTES Find the volume of the solid formed by rotating the region bounded by the given curves about the indicated axis of revolution. y = e', y = x + 1, x = 0, x = 3; about the y-axis at( @5 -43) X 2 15. [-/4 Points] DETAILS MY NOTES Find the volume of the solid formed by rotating the region bounded by the given curves about the Indicated axis of revolution. y = x2 + 4, x = 0, x = 2, y = 0; about x = 3