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!

Integration question.

  1. Apr 29, 2009 #1
    1. The problem statement, all variables and given/known data

    Jon needs to bulk-up for next AFL season. His energy needs t days after starting his weight gain program are given by E(t) = 350(80 + 0.15t)^0.8 - 120(80 + 0.15t) calcories/day. Find Jon's total energy needs over the first week of the program.


    2. Relevant equations



    3. The attempt at a solution
    I integrated the fuction above and interval was [0, 7] as the question says total energy needs over the first week. The answer i got was 14377 but the answer is 14400.
    I think there is some problem with the interval or the value of C which i couldnt find.
    Help me please~
     
  2. jcsd
  3. Apr 29, 2009 #2

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    There is no "C" in this problem. What do you mean by that? If it were me, I wouldn't integrate. Since you are give "calories per day" and days are discreet quantities, I would just add E(0)+ E(1)+ E(2)+ E(3)+ E(4)+ E(5)+ E(6). Since E(7) is the calories needed after 7 days, it is not included in the calories consumed in the first 7 days.
     
  4. Apr 29, 2009 #3
    14378 is the answer i got from your method. And this question was under the heading of Integration so i think i should use integration method to solve it.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Integration question.
  1. Integral Questions (Replies: 2)

  2. Integration question (Replies: 2)

  3. Integral Question (Replies: 5)

  4. Integral Question (Replies: 8)

  5. Integration Question (Replies: 4)

Loading...