The answer in scientific notation would be 5×10^1 Which is 50 in standard notation
To get this you first look for you two numbers which are 1*10^21 and 5*10^22
However a key word in this word problem is how many times greater than
When you see this, you will divide so 1×10^21 ÷ 5×10^22 = 5×10^1
When you have your answer to convert it into standard notation you just add one 0 to the 5 giving you 50, because its only to a power of 1
Therefore, the diameter of the IC 1101 is 50 times greater than the diameter of the Milky way