1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Symbolic Question

  1. Aug 29, 2007 #1
    Hi guys, can you help me out with a homework question. I'm stuck and dont know what to do. Question state:

    A spherical balloon with radius r inches has volume V(r) = (4/3)r3. Find a function that represents the amount of air A required to inflate the balloon from a radius of r inches to a radius of r + 1 inches.


    Don't I just replace (r) with (r+1).. ?


    3. The attempt at a solution

    A(r)= (4/3)pi(r+1)^3 ??

    Thanks a lot.
     
  2. jcsd
  3. Aug 29, 2007 #2
    That would be the amount of air required to inflate a balloon of radius r+1. You want a *difference*.
     
  4. Aug 29, 2007 #3
    ahh got it :) thank you genneth...
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Symbolic Question
  1. Symbol for an (Replies: 1)

Loading...