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9 August, 02:18

For every 90 minutes of sleep, a person has one dream stage. Rachel went to bed at 10:00 P. M. and woke up at 5:00 A. M. How many dream stages did she likely have?

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  1. 9 August, 05:11
    0
    10 p. m. to 5 a. m. = 7 hrs = (7 * 60) = 420 minutes

    420/90 = 4.67 ... she had 4.67 dream stages
  2. 9 August, 05:23
    0
    Rachel had 8 hours of sleep and 4 1/3 dreams.
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