I have a few quick questions for this project i have...

one of them ask:

5. if you wanted the area to be 20 m^2, what would the dimensions of a rectangle to minimize the amount of fencing needed? use a graphing calculator to determine the answer.

-->i remember him saying that the the dimensions is related to the square root of 20. i just don't remember how to get the formula to put it in the calculator and show it...

the whole project's purpose is to show him our knowledge to solve real-life problems that can be analyzed by Graphical, Numerical or Algebraic. [Numerical meaning completing a table of values]

and one question asks: what are the weaknesses and strengths of these strategies?

any help would be appreciated...thank you!