Question

Jeff, a local traffic engineer, has designed a new pedestrian footbridge. The bridge has been designed to handle 200 pedestrians daily. Once the bridge reaches 1,000 pedestrians daily, however, it will require a new bracing system. Jeff has estimated that traffic will increase annually at 5%. How long will the current bridge system work before a new bracing system is required? What if the annual traffic rate increases at 8% annually? At what traffic increase rate will the current system last only ten years?



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  • CreatedMay 08, 2014
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