The use of electricity in the US in 1902 was 6.03 x 10^9 kilowatt-hours.%0D%0A%0D%0AThe use of electricity in the US in 1950 was 4.3 x 10^11 kilowatt-hours.%0D%0A%0D%0AWhat was the total kilowatt-hours of electricity used during these two years?%0D%0A%0D%0A(2 points)%0D%0AResponses%0D%0A%0D%0A(6.3×109)+(4.3×1011)=10.33×1020=1.033×1019%0D%0A(%0D%0A6.3%0D%0A×%0D%0A10%0D%0A9%0D%0A)%0D%0A+%0D%0A(%0D%0A4.3%0D%0A×%0D%0A10%0D%0A11%0D%0A)%0D%0A=%0D%0A10.33%0D%0A×%0D%0A10%0D%0A20%0D%0A=%0D%0A1.033%0D%0A×%0D%0A10%0D%0A19%0D%0Aopen paren 6 point 3 times 10 to the 9th power close paren plus open paren 4 point 3 times 10 to the 11th power close paren is equal to 10 point 3 3 times 10 to the 20th power is equal to 1 point 0 3 3 times 10 to the 19th power%0D%0A%0D%0A(6.3×109)+(4.3×1011)=0.063×1011+(4.3×1011)=4.363×1011%0D%0A(%0D%0A6.3%0D%0A×%0D%0A10%0D%0A9%0D%0A)%0D%0A+%0D%0A(%0D%0A4.3%0D%0A×%0D%0A10%0D%0A11%0D%0A)%0D%0A=%0D%0A0.063%0D%0A×%0D%0A10%0D%0A11%0D%0A+%0D%0A(%0D%0A4.3%0D%0A×%0D%0A10%0D%0A11%0D%0A)%0D%0A=%0D%0A4.363%0D%0A×%0D%0A10%0D%0A11%0D%0Aopen paren 6 point 3 times 10 to the 9th power close paren plus open paren 4 point 3 times 10 to the 11th power close paren is equal to 0 point 0 6 3 times 10 to the 11th power plus open paren 4 point 3 times 10 to the 11th power close paren is equal to 4 point 3 6 3 times 10 to the 11th power%0D%0A%0D%0A(6.3×109)×(4.3×1011)=25.929×1020=2.6×1019%0D%0A(%0D%0A6.3%0D%0A×%0D%0A10%0D%0A9%0D%0A)%0D%0A×%0D%0A(%0D%0A4.3%0D%0A×%0D%0A10%0D%0A11%0D%0A)%0D%0A=%0D%0A25.929%0D%0A×%0D%0A10%0D%0A20%0D%0A=%0D%0A2.6%0D%0A×%0D%0A10%0D%0A19%0D%0Aopen paren 6 point 3 times 10 to the 9th power close paren times open paren 4 point 3 times 10 to the 11th power close paren is equal to 25 point 9 2 9 times 10 to the 20th power is equal to 2 point 6 times 10 to the 19th power%0D%0A%0D%0A(6.3×109)×(4.3×1011)=25.929×102=2.6×101
9
The total kilowatt-hours of electricity used during 1902 and 1950 was approximately 1.033 x 10^19 kilowatt-hours.