November 1st, 2012, 11:39 AM  #1 
Senior Member Joined: Jun 2011 Posts: 154 Thanks: 0  a few problems I'm stuck on
Hello, I attached four jpg files to this post, it is screenshots of problems I had on a quiz last week. I could really use some help understanding how to work them. Some of them I answered correctly because of solutions I found online but could not really understand them I have a test Monday so I'll be doing this all weekend most likely. Thanks. 
November 2nd, 2012, 03:45 AM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 522 Math Focus: Calculus/ODEs  Re: a few problems I'm stuck on
I'll work the first one: The perimeter of the enclosed area is: The area is: From the perimeter, we find: Hence: Equating the derivative to zero, we find: 
November 2nd, 2012, 10:50 PM  #3 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 522 Math Focus: Calculus/ODEs  Re: a few problems I'm stuck on
Here is the last one. The area of the rectangle will be: where Hence: 
November 3rd, 2012, 01:18 PM  #4 
Senior Member Joined: Jun 2011 Posts: 154 Thanks: 0  Re: a few problems I'm stuck on
Thanks


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