The average mass of a galaxy is 1011Mo. In the Coma Cluster, there are estimated to be about 1000 galaxies. What should the mass of the Coma Cluster be if all the mass is due to the galaxies we see

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

i would like to make dinner for my mom, dad, and sister

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.