Answer:
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8pm to 2am, or 8am to 2pm, either way, Carla would've worked for 6 hours.
6*$13=$78
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Carla would earn $78 if she were to clean for 6 hours.
<span>you could have 3.15=100 times 0.0315, 10 times 0.315.</span>
6x is an example of a variable