Help please I’ll give extra points

You have the right answer

guidelines suggest asking no more than 2-3 questions per post.    i'll focus on one question: assignment: surface area of a cylinder investigation  radius: 2 inchesheight: 9 inchesthe volume, v, is v = pi*r^2(h).  here, that'd be v = 3.14(4 in^2)(9 in), or                                                                              v = 113.04 cubic inches