Answer:
She will need 12 study sessions.
Explanation:
As per the given statement: Lisa has 6 hours of studying to do, if she divide her study time into 
 hour sessions.
 hour sessions.
we have to calculate the sessions will she need.
Total hours she has = 6 hours
She divide her study time per sessions is, 
 hours.
 hours.
⇒ Number of sessions = 

or
Number of sessions = 

Therefore, 12 study sessions will she need.