The hubble constant, $h_{0}$, is the ratio of the recessional velocity of a galaxy to its distance. the hubble constant is estimated to be 70 km/sec per million parsecs of distance. (one parsec is equal to 3.26 light years.) based on this ratio, how many billions of light years away would a galaxy be if it had a recessional velocity of 300,000 km/sec?

14 billion light years away

Explanation:

v = Recessional velocity = 70km/s/million parsec

D = Proper distance

Hubble constant

From Hubble's law we have the relation

The distance in light years of the galaxy is 14 billion light years away

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

answerscientific theory;