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A large elliptical galaxy at the center of a cluster of galaxies is located at a...

A large elliptical galaxy at the center of a cluster of galaxies is located at a distance of 400 Mpc from

us.

a. Calculate the velocity (in km/s) at which the galaxy recedes from us if its motion is completely due to the expansion of the universe as expressed by the Hubble Law. (3 points)

b. Calculate how many years the light has traveled from the galaxy to reach us. [Hint: this is the same as the distance measured in light-years. 1 Mpc = 3.26 million lt-yr] (1 point)

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