anonymous
  • anonymous
Need work check A farmer has 400 feet of fencing and wants to enclose a rectangular pasture. One side of the pasture is along a river and does not need fencing. What should the deminsions of the rectangular pasture be, so as to maximize the enclosed area?if on I have it as x+2L=400 Solve for L= -.5x+200 A= x*L A=-.5X^2+200X dA=-x+200 x=200 thus the maximum area is 200*100 Did I do this properly?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
yes.. but how do you know it's a max and not a min? (this is something my teacher always asked because I always assumed it is...)
anonymous
  • anonymous
because if I plug it back into A it gives me a positive number?
anonymous
  • anonymous
good. you do the first deriv test.

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anonymous
  • anonymous
lol plus I could check increasing decreasing but thats just annoying lol
anonymous
  • anonymous
yep...
anonymous
  • anonymous
thats for helping me understand that concept a little more i never even thought about it that way!
anonymous
  • anonymous
yw.:)

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