Volume of a square using cross section

  • #1

Homework Statement


What is the volume if the area bounded by y=x^2 and y=9 and the cross sections are perpendicular to the y axis


Homework Equations





The Attempt at a Solution


I have no idea
 

Answers and Replies

  • #2
DryRun
Gold Member
838
4
At least draw the graph and make an attempt. Take a picture of it or scan it or just draw it in some picture editor and attach it to your post.
 
  • #3
I drew the picture and y=9 is the higher graph and y=x^2 is the lower graph. So from there do you do (9-x^2)^2 and take the integral from -3 to 3 ?
 
  • #4
94
1
The cross sections are perpendicular to the y-axis, not parallel. So the integral will be with respect to y, not x.
 

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