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Your new cell phone battery needs to be charged for 3 hours and 45 minutes before using it. If you plug the battery into the charger at 8:20am. You should wait till what time before using it?

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Explanation

Given that the starting point for charging is 8.20 am and that it takes 3 hours and 45 minutes to charge before one can use it. Therefore,

[tex]\begin{gathered} \text{ }8:20 \\ +3:45 \\ ---- \\ \text{ 12: 05} \end{gathered}[/tex]

Answer: 12: 05 PM

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