Solve Rectangular Cattle Feeding Pen Problem - Find Domain of A(X)

[r-soy]

Hi all >>

How can I solve it?

A rectangular feeding pen for cattle is to be made with 100 meters of fencing .

Find :
1 - If X represents the width of the pen, express its area A(X) in terms of X
2 - What is the domain of the function A (determind by the physical restrictions ) ?
my regard

 

[Integral]

You need to show us some work.

Can you show us the formula for finding the area of a rectangle?

 

[LCKurtz]

Start by drawing a picture, labeling the variable(s) and showing what you have tried.

 

[r-soy]

Then what I do?

 

[Mark44]

The attachment is pending approval, so we probably won't be able to see your drawing for several hours. What are the labels you put on each side of the rectangle? Keep in mind that you have 100 m. of fencing. What is the area of your rectangle? If you have labelled the sides correctly, you should have the area as a function of just one variable.

 

[r-soy]

http://www.up-00.com/s1files/gv733764.jpg

 

[Mark44]

Can you label the sides of the rectangle using just a single variable? You're given a value for the perimeter.