8 X 10-4
to solve, use Pemdas
Parentheses
Exponents
Multiplication
Division
Adding
Subtracting
there are no exponents ore parantheses so multiply first 8 X 10= 80 now do your subtraction 80-4=76
so your equation becomes 76 /2 X 102
no we will do the division
76/2= 38 now we have 38 X 102
our final answer would be 3876
if that is wrong thats what you get for looking for answers online, however that is the answer that i would come up with. Good Luck!!