The linear density of a rod, in g/m, is given by 
. The rod extends from the origin to x = 0.400 m. What is the location of the center of mass of the rod?
A. x = 0.213 m
B. x = 0.315 m
C. x = 0.384 m
D. x = 0.184 m
E. x = 0.208 m
Answer: A
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