Answer:
A,C,D
...............................
There isn't enough info to determine that, I believe. You would need an equation that would allow me to determine the minimum output for an A.
There is no difference, 6rs-(-2rs) if you get rid of the parenthesis you are left with 6rs- -2rs and two negatives make a positive therefore the answer will become 8rs... I hope this helps :)
-2 is 5 less than 3
hope this helps
I think it is
I4.23 x 10 ^4