Question: The vertical sag s (in ft) at the middle of an 800-ft power line as a function of the temperature T (in F) is given

The vertical sag s (in ft) at the middle of an 800-ft power line as a function of the temperature T (in °F) is given in the following table. See Fig. 3.44. For the function s = f(T), find f(47) by linear interpolation.

T (F) s (ft) 0 20 40 10.2 10.6 11.1 Fig. 3.44

T (F) s (ft) 0 20 40 10.2 10.6 11.1 Fig. 3.44 60 11.7 800 ft S

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