The length L in centimeters of a copper rod is a linear function of its Celsius temperature C.
a. If L = 124.942 when C = 20 and L = 125.131 when C = 110, find a linear function L(C) that gives the length of the rod as a function of its Celsius temperature.
b. What is the length of the rod if the temperature is 50°C?
c. If the rod is 125.0764 centimeters long, what is its Celsius temperature?
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