One kilowatt-hour is equivalent to - joules-displaystyle 3-6times 10-6-displaystyle 6times 10-6-displaystyle 3times 10-6-displaystyle 1-8times 10-6-

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One kilowatt-hour is equivalent to ______ joules.
$3.6 \times 10^{6}$
$6 \times 10^{6}$
$3 \times 10^{6}$
$1.8 \times 10^{6}$

3 \times 10^{6}

1.8 \times 10^{6}

3.6 \times 10^{6}

6 \times 10^{6}

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