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) About Me  (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 .

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

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