How long is the snack break from 9:00 a.m. to 9:30 a.m.?, 50 minutes, 30 minutes, What is the elapsed time of the talent show from 9:30 a.m. to 10:30 a.m.?, 1 hour, 1 hour and 10 minutes, What is the time spent singing happy birthday and cutting the cake from 10:30 a.m. to 11:00 a.m.?, 40 minutes, 30 minutes.

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