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Mathematics 7 Online
OpenStudy (anonymous):

The resistance y in ohms of 1000 feet of solid copper wireat 77°F can be approximated by the model given below wherex is the diameter of the wire in mils (0.001 inch). Use agraphing utility to graph the model. y=10,700/x^2-(0.37), 5≤x≤100 If the diameter of the wire is halved,the resistance is changed by about what factor?

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