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anonymous
 one year ago
???
anonymous
 one year ago
???

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phi
 one year ago
Best ResponseYou've already chosen the best response.2you are told 2x+y= 800 you know Area= x*y using the first equation, we find y= 8002x so Area = x(8002x) now do the calculus thing: find the derivative and set it equal to 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Do I distribute the x and then derive?

phi
 one year ago
Best ResponseYou've already chosen the best response.2you could use the product rule, but distributing is easier

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay so when I distribute the x I get 800x2x^2 and when I derive it I get 8004x and then I set it to 0. 8004x=0. 4x=800 and x=200

phi
 one year ago
Best ResponseYou've already chosen the best response.2the question asks for the max area, so use x=200 to find the area.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So it would be 160,000?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Because I would multiply 800 and 200?

phi
 one year ago
Best ResponseYou've already chosen the best response.22x+y= 800 2*200+y= 800 y= 400

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And then I would plug that into A=xy and get 80,000 correct?
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