Human: The fall semester lasts 15 weeks.  During the weekdays, Paris studies 3 hours a day for her classes.  On the weekends, she spends 4 hours studying on Saturday and 5 hours studying on Sunday.  How much time does Paris study during the semester? Assistant:
During the weekdays, Paris studies 3 hours a day for 5*3 = 15 hours
She studies 4 hours on Saturday and 5 hours on Sunday for a total of 4+5 = 9 hours on the weekends
If she studies 15 hours during the weekdays and 9 hours on the weekends then she studies 15+9 = 24 hours per week
There are 15 weeks in the fall semester and she studies 24 hours a week so she will spend 15*24 = 360 hours studying