Question

Can someone check if I am doing this correctly?

Answer 1

Using Shells Method.

Answer 2

that's a vertical line.

Answer 3

?

Answer 4

rotate around y=8 ? correct ?

Answer 5

Correct.

Answer 6

so where does the dy come from?

Answer 7

but you did around x=8
for the shell method slices should be parallel to the rotation of axxis

Answer 8

Oh wait so I have to do dx huh? Since its a Vertical Rotation?

Answer 9

A Horizontal Rotation - dy

Amiright?

Answer 10

for shells method specifically.

Answer 11

you can still do it either way

but you might wish to start thinking about what it actually means

so consider this



and this

Answer 12

First one is shells,

the second one is discs/washers

Answer 13

is it supposed to be like this ??