Question if a galaxy is receding from us at 894 kms and is, Ask an Expert

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problem: If a galaxy is receding from us at 894 km/s and is located at a distance of 12 Mpc, what is the age of the universe, if the universe if flat?

(a) about 20 billion years

(b) about 1.3 billion years

(d) around 9 billion years

(e) around 18 billion years

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