A rectangular pen is built with one side against a barn. If 1800 m of fencing are used for the other three sides of the​ pen, what dimensions maximize the area of the​ pen?   b. A rancher plans to make four identical and adjacent rectangular pens against a​ barn, each with an area of 100 m2 ​(see figure). What are the dimensions of each pen that minimize the amount of fence that must be​ used?

Algebra for College Students
10th Edition
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter9: Polynomial And Rational Functions
Section9.4: Graphing Polynomial Functions
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A rectangular pen is built with one side against a barn. If
1800
m of fencing are used for the other three sides of the​ pen, what dimensions maximize the area of the​ pen?
 
b. A rancher plans to make four identical and adjacent rectangular pens against a​ barn, each with an area of
100 m2
​(see figure). What are the dimensions of each pen that minimize the amount of fence that must be​ used?
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