Astronomers on Earth, an inertial reference frame, observe galaxies A and B that are moving away from the Earth as shown. The speeds indicated are those measured by the astronomers on Earth. What is the speed of galaxy B as measured by an observer in galaxy A? 
A) 0.22c
B) 0.60c
C) 0.71c
D) 0.95c
E) 1.42c
Correct Answer:
Verified
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