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

tejasree

A farmer has 336 ft of fencing and wants to build two identical pens for his prize-winning pigs. The pens will be arranged as shown. Determine the dimensions of a pen that will maximize its area.

  • one year ago
  • one year ago

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

    |dw:1354506861516:dw|

    • one year ago
  2. petewe
    Best Response
    You've already chosen the best response.
    Medals 0

    Fencing = 3x + 4y 336 = 3x + 4y Area = 2xy A = 2xy x = (336-4y) / 3 A = 2[(336-4y)/3] y Find dA/dy and equate to 0. solve for y.

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

    I dont understand this part: x = (336-4y) / 3 A = 2[(336-4y)/3] y Find dA/dy and equate to 0. solve for y.

    • one year ago
  4. petewe
    Best Response
    You've already chosen the best response.
    Medals 0

    i rearranged the fencing equation in terms of x and subbed it into the area equation. find the derivative of A with respect to y. make it equal 0. solve for y. sub y into original equation and solve for x.

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

    I dont know deriatives yet!

    • one year ago
  6. tejasree
    Best Response
    You've already chosen the best response.
    Medals 0

    pls help me! I have to study for my final exam!!!

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

    instead of taking the derivative, find the vertex of the quadratic equation.

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

    ok! I will try and call for you when I dont get it!

    • one year ago
  9. petewe
    Best Response
    You've already chosen the best response.
    Medals 0

    the x value of your vertex will be y

    • 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.