SOLUTION: a rectangular pen for a pet is 7 feet longer than it is wide. Give possible values for the width of the pen if it s area must be between 170 and 800 square feet inclusively.
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Question 767360: a rectangular pen for a pet is 7 feet longer than it is wide. Give possible values for the width of the pen if it s area must be between 170 and 800 square feet inclusively.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let 
represent the width, and then 
must represent the length. The area, as a function of is then \ =\ w^2\ +\ 7w)
.
Since the area must be at least 170 square feet and at most 800 square feet, we can say:
To find the lower limit, solve 
for its positive root. To find the upper limit, solve 
for its positive root.
In summary:
You can do your own arithmetic.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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