Typically, the number of hours in a proper bed is 7-9 hours for adults and 8.5-9.25 hours for adolescents but with duty or learning. Makes many people not able to get this lifetime.
Typically, the number of hours of sleep 7-9 hours is appropriate for adults and 8.5 to 9.25 hours for teens. But with work or school. Many people can not lie as much in this lifetime.
Usually, the number of hours in the proper sleep is 7-9 hours for adults and 8.5-9.25 hours for teenagers. But with the work or study. Make a lot of people can"t sleep so much throughout life.