2. Joan went to the park at 3:00 She can stay 3 hours. She must go home at __ o'clock.

Jean went to the park at 3:00. If she can stay for 3 hours, you simply add those 3 hours to her arrival time:<br /><br />3:00 + 3 hours = 6:00<br /><br />Therefore, Jean must go home at 6:00 o'clock.