The use of electricty in the US in 1902 was 6.03 times 10^9 kilowatt-hours.
The use of eletricty in the US in 1950 was 4.3 times 10^11 kilowatt-hours.
How many times more was the electricty used in 1950 than 1902? Express your answer in Scientific Notation.
To find out how many times more electricity was used in 1950 than in 1902, we need to divide the electricity used in 1950 by the electricity used in 1902.
Electricity used in 1950 = 4.3 x 10^11 kWh
Electricity used in 1902 = 6.03 x 10^9 kWh
Now, let's divide the electricity used in 1950 by the electricity used in 1902:
(4.3 x 10^11) / (6.03 x 10^9)
To divide these numbers, we can divide the coefficients and subtract the exponents:
4.3 / 6.03 = 0.7128
10^11 / 10^9 = 10^(11-9) = 10^2
Therefore, the electricity used in 1950 was 0.7128 x 10^2 times more than the electricity used in 1902.
Expressed in scientific notation, this is:
0.7128 x 10^2 = 7.128 x 10^1 = 71.28
So, the electricity used in 1950 was 71.28 times more than the electricity used in 1902.