SOLUTION: Patricia wishes to have a rectanglar garden in her backyard. She has 80 ft of fencing with which to enclose her garden. Letting x denote the width of the garden, find a function f

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Question 640294: Patricia wishes to have a rectanglar garden in her backyard. She has 80 ft of fencing with which to enclose her garden. Letting x denote the width of the garden, find a function f in the variable x giving the area of the garden. What is its domain?
Answer by sachi(548) About Me  (Show Source):
You can put this solution on YOUR website!
width=x
perimeter=80
or 2(x+l)=80
so l=length=40-x
so the area=x(40-x)
the area can never be 0
x(40-x)>0
this gives the domain as 0