3.6 + 6.1 = 9.7
Lets go through your choices to see which one is correct
10^3 = 1000
10^6 = 1,000,000 (So, B & D aren't your answers that you're looking for
Now we have to choose from A & C.
C. isnt your answer because it equals 97,000
Option A. 9.7✖10^3 would most likely be your answer!