can someone please help me with this ,,,, Idk if I am adding something wrong or what :(
in general the formula for the volume of a cylinder is
\(V = \pi r^2 h\)
looking at #1 we have \(V = \pi (12^2) (8) \approx 3619.115 \)
it looks like you squared the diameter instead of the radius
Looking at #2 \(V = \pi (7.5^2)(4) = 706.858\)
again you used the diameter instead of the radius
You got the 3rd one correct because they gave you the radius, not the diameter, in the diagram.