Answer:
Hi sis, I hope this is correct
Step-by-step explanation:
In my calc I typed in 8 x 10^-3 divided by 4 x 10^-6
It said 2 x 10^-9
So my calculator says it is the first box
You have to do 8 x 10*3 then 4 x 10*6 then subtract to see how many times greater it is.
8 in half is 4, so that is 2
leave the 10 the same, so 4 x 10
3 and 6 3 in common, so 4 x 10*3
