Aimee's karate class starts at 4:00 pm.
If Aimee's karate class lasts for 1 hour and 15 minutes and ends at 5:00 pm, we can determine the start time by subtracting 1 hour and 15 minutes from 5:00 pm.
To subtract the time, we convert 1 hour and 15 minutes to minutes:
1 hour = 60 minutes
1 hour and 15 minutes = 60 minutes + 15 minutes = 75 minutes
Now, we subtract 75 minutes from 5:00 pm:
5:00 pm - 75 minutes = 4:00 pm
Therefore, Aimee's karate class starts at 4:00 pm.
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