Posted by **Hannah** on Tuesday, May 21, 2013 at 4:52pm.

We're learning disks, shells, and cylinders in school but we have a substitute and I've been trying to teach this to myself. Can you check them please? =) Thank you!

1) Find the volume of the solid formed when the region bounded by curves y=x^3 + 1, x= 1, and y=0 is rotated about the x-axis.

My answer is 23/14.

2) Find the volume of the solid of revolution obtained by revolving the region bounded by y=1/x and the lines x=pi/8 and x=pi/2 around the x-axis.

I got 6/pi for this one.

3) Find the area bounded by the curves f(x)= x^3 + x^2 and g(x)= 2x^2 + 2x.

My answer: 5/12

Can you tell me if I did them wrong, and if I did do them wrong what I Did wrong?

## Answer This Question

## Related Questions

- Calculus - We're learning disks, shells, and cylinders in school but we have a ...
- Can no one help?! - 1. Use cylindrical shells to compute the volume of the solid...
- Calculus - 1. Use cylindrical shells to compute the volume of the solid formed ...
- calculus 2 - Find the volume of the solid formed by rotating the region enclosed...
- Calculus - This problem set is ridiculously hard. I know how to find the volume ...
- Calculus - Find the volume of the solid by subtracting two volumes, the solid ...
- CALCULUS - The region R is bounded by the x-axis, y-axis, x = 3 and y = 1/(sqrt(...
- CALCULUS HELP PLZ - The region R is bounded by the x-axis, y-axis, x = 3 and y...
- Calculus [Finding volume of solid] - Find the volume of the solid formed by ...
- calculus 1 - can you please help me, i'm really confused Use the method of ...

More Related Questions