Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Unam Group Title

Find the volume of the solid obtained by rotating the region bounded by x=8 y^2, y = 1, x = 0, about the y-axis. a) 8 y^2=0, x=0, how can I solve this when its like this, I mean there's no other x values so i can use the (0, ?)∫. I'm using this V = π ∫ f(x)² dx {a,b}

  • one year ago
  • one year ago

  • This Question is Closed
  1. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1351976086595:dw|

    • one year ago
  2. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1351976458012:dw|

    • one year ago
  3. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    What's the graph between? 0 to 8 or 0 to 1?

    • one year ago
  4. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    You can't use this formula in this case.

    • one year ago
  5. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    oh ok...

    • one year ago
  6. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1351976777364:dw| And now you can. Calculate this integral and it will be the volume.

    • one year ago
  7. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks so down we... v= π (0,1) ∫(8x^2)^2 dx-(8-x)^2π?

    • one year ago
  8. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    don't*

    • one year ago
  9. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Can't understand you, just calculate the integral I've written. And it will be the volume. Can you do this?

    • one year ago
  10. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry, yup i can

    • one year ago
  11. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    You can type the result and I will check it.

    • one year ago
  12. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok :)

    • one year ago
  13. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    64π/5?

    • one year ago
  14. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes. That's correct.

    • one year ago
  15. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh thanks so much!

    • one year ago
  16. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so I just use 1 and 0 for ∫?

    • one year ago
  17. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1351977717019:dw|

    • one year ago
  18. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i know how i get 0 but not sure about 1, we use the graph right? cos its not between 0 and 1?

    • one year ago
  19. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    You need to understand how the formula is built to get how to solve this problem. I just switch x and y, so you can use your formula.

    • one year ago
  20. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Ah ok

    • one year ago
  21. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    If you will rotate the area on my second figure about x-axes you will get the volume i drew on the first figure. Got it?

    • one year ago
  22. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    YEs!!!

    • one year ago
  23. Unam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks much Klim!!

    • one year ago
  24. klimenkov Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    No problems.

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.