Find the volume of the region formed by revolving the following regions about the given axis.
y = x^2, x = -1, x = 4, y = 0 (x-axis)

I know i need to find the integral using π ∫r^2 with a at the bottom of the integral and b at the top. I just dunno how to get those numbers?

Question

Find the volume of the region formed by revolving the following regions about the given axis.
y = x^2, x = -1, x = 4, y = 0 (x-axis)

I know i need to find the integral using  π ∫r^2 with a at the bottom of the integral and b at the top. I just dunno how to get those numbers?

tkhunny · Answer

Have you considered a = -1 and b = 4

anonymous · Answer

I'm more so confused on how to get r? is it just x^2 and then when i plug it into the integral it'd be (x^2)^2?

tkhunny · Answer

What's wrong with that?

anonymous · Answer

I can't tell if you're saying i made a mistake or if that is correct?

anonymous · Answer

never mind, i was correct. doumo arigatou

tkhunny · Answer

Ei kestä!