Hi there! 
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I believe your answer is: 
Two Hours 
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Here’s why: 
- Jordan is staying the duration of the movie and the previews. 
- The previews are (1/4) the time of the movie, which is 96 minutes. 
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The previews should be 24 minutes. 
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Jordan should stay for 120 minutes, or two hours. 
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Hope this helps you. I apologize if it’s incorrect.