Galaxy A is 300 Mpc from Galaxy B. Hubble's Law says that V=H0 x D. About how fast is Galaxy A receding from the perspective of Galaxy B? Use a value of 75 km/s/Mpc for Hubble's constant.
A. 225 km/s
B. 30000 km/s
C. 75 km/s
D. 22500 km/s
E. 15000 km/s
Ans: D. 22500 km/s
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