She should get up at the latest by 7:00 AM.
20 minutes to get dressed + 15 minutes to eat breakfast + 12 minutes to walk to school = 47 minutes
7:45 AM - 47 minutes = 7:00 AM
A girl needs to be at school by 7:45 AM. If it takes her 20 minutes to get dressed, 15 minutes to eat breakfast, and 12 minutes to walk to school, what time should she get up at the latest?
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