Question

Question 8 » Our galaxy, the Milky Way, has a diameter of about 1* 10^21 meters. The largest galaxy known to man, the IC 1101, has a diameter of 5 * 10^22 meters. The diameter of the IC 1101 is about how many times greater than the diameter of the Milky Way? Milky Way: 1x 1021 m IC 1101: 5 x 1022 m 5 50 5,000 500

Answer 1

We want to find the ratio of the IC 1101 galaxy diameter (Dic) to the milky Way diameter (Dmw), we can do it like this:

`\frac{Dic}{\text{Dmw}}=(5*10^(22))/(1*10^(21))`

And from the exponent property:

`(a^b)/(a^c)=a^(b-c)`

Then:

`\frac{Dic}{\text{Dmw}}=(5*10^(22))/(1*10^(21))=5*(10^(22))/(10^(21))=5*10^(22-21)=5*10^1=5*10=50`

Then, the diameter of the galaxy IC 1101 is 50 times the diameter of the milky way