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i am having this question to be answered , i am new to the cosmology studies and still a bit confused about some formulas.

the question is:

(a) The greatest redshift known corresponds to the cosmic microwave background

(CMB, CBR) at redshift z 1100 (although the redshift is obtained theoretically

rather than observationally). UDFy-38135539 is a galaxy with the high redshift of

z = 8:555. By what factor did the volume of the universe increase between the

epochs corresponding to z = 1100 and z = 8:555?

what i am thinking of is using the scale factor with the relationship of the redshift for z= 1100

R= 1/1+1100 = 1/1101

then calculate the volume for a dimension universe of the z= 1100

volume = 1/1001*1/1101*1/1001*V (z=8.555)

is that corrects ?

otherwise how i can be solving this question.

thanks

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# I How to solve for the volume of the universe / redshift

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