Reggie earns $12.65 per hour and works 38 hours per week. How much does he earn in a week before taxes are taken out?
2 answers:
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Answer:
i
( the comma means there is space between the sqrt of 2 and the i.
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<em>Luna G.</em>
Let be the volume of 20% solution,
the volume of the 60% solution. We want a total volume of 400 mL in the final mixture, so
Each mL of either solution will contribute a corresponding concentration, and in the final mixture we want the 400 mL to have a 40% concentration, which means we should also have
Solve the system and we get .