A community for students.
Here's the question you clicked on:
 0 viewing
patbatE21
 4 years ago
Find the volume generated by revolving about the xaxis the area bounded by xy = 9, the xaxis and lines x = 3 and x=9
patbatE21
 4 years ago
Find the volume generated by revolving about the xaxis the area bounded by xy = 9, the xaxis and lines x = 3 and x=9

This Question is Closed

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1324412465826:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1something similar to this right?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1then we can integrate, or sum up the areas of circles, generated by the function from 3 to 9 i believe

patbatE21
 4 years ago
Best ResponseYou've already chosen the best response.0May I please see a full work out please?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1\[\sum_{3}^{4}\pi[f(x)]^2\ \Delta x\] \[\pi \int_{3}^{9}(\frac{9}{x})^2dx\]

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1324412686951:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1if we take any arbitrary circle created by spinning this about the x axis; we get an area of: pi (y)^2 pi (9/x)^2 the volume generated is then adding up all the circles made from x=3 to x=9

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.1are you still stuck? can you not integrate\[\pi\int_{3}^{9}\frac{9^2}{x^2}dx\]? or are you having another problem?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1http://www.wolframalpha.com/input/?i=integrate+pi*%289%2Fx%29%5E2+from+3+to+9 18pi looks good to me
Ask your own question
Sign UpFind more explanations on OpenStudy
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
 Engagement 19 Mad Hatter
 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.