How many times is 5×10^ 6 larger than 5×10^4 ?
So 10^6 is 10^(6-4) = 10^2 times larger than 10^4. SInce they are both multiplied by 5, we know that 5* 10^6 is 10^2 times larger.
If you don't understand anything feel free to ask.
+1005 
