A zoo habitat along a glass walkway must enclose 4500 ft2 and use as little border fencing as possible. No border fencing is needed along the glass walkway. The habitat is to be a rectangle divided into four equal sections by an interior fence that runs parallel to the exterior side fence. What is the minimal amount of border fencing that is required? Note: Be sure to justify that your answer is the desired minimum over the logical interval for your variable. Remember to include units in your answer! Walkway

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