project help!!!

bumblee

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Oct 17, 2009
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Can someone please walk me through this

you have 100 meters of fencing material to enclose a rectangular plot of land. Your goal is to determine the dimensions of the plot that would maximize the area.

Express the area of the rectangular plot as a function of the length x of one side.---- i think that this would be A(x)= x((100-2x)/2)

a. when x is 0 A(x)= ?
when x is 5 A(x)=?
when x is 10 A(x)=?

b. What is the realistic domain of the function?

c. Solve the problem algebraically by showing that the area function can be written as A(x)=625-(x-25)^2 and how does this form of the function allow you to find the dimensions that produce a maximum area?

d. discuss the strengths and weaknesses of the three strategies

e.could you make another shape which allows you to use 100 meters of fencing to enclose a greater are?
 
\(\displaystyle Hint: You \ have \ 100ft. \ of \ fencing \ and \ want \ to \ maximize \ area\)

\(\displaystyle The \ maximum \ area \ is \ a \ circle \ (e): \ A \ = \ 795.77 \ ft^{2}, \ for \ a \ rectangle, \ the \ maximum \ area \ is \ a\)
\(\displaystyle \ square, \ A \ = \ 625ft^{2}.\)
 
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