The use of electricity in the US in 1902 was 6.03 x 10^9 kilowatt-hours.
The use of electricity in the US in 1950 was 4.3 x 10^11 kilowatt-hours.
What was the total kilowatt-hours of electricity used during these two years?
A. (6.03 x 10^9) + (4.3 x 10^11) = 10.33 x 10^20 = 1.033 x 10^19
B. (6.03 x 10^9) + (4.3 x 10^11) = (0.0603 x 10^11) + (4.3 x 10^11) = 4.3603 x 10^11
C. (6.03 x 10^9) x (4.3 x 10^11) = 25.929 x 10^20 = 2.6 x 10^19
D. (6.03 x 10^9) x (4.3 x 10^11) = 25.929 x 10^2 = 2.6 x 10^1