Final answer:
Each session is 1.5 hours long, which lies between the whole numbers 1 and 2.
Step-by-step explanation:
The question is asking how long each session should be if Francesca has 3 hours worth of homework that she wants to complete in 2 equal sessions. To find the length of each session, we would divide the total homework time by the number of sessions. So, we divide 3 hours of homework by 2 sessions to get 1.5 hours per session.
Since we are looking for whole numbers to bracket our answer, 1.5 hours is between the whole numbers 1 and 2. Therefore, each session would last 1.5 hours, and this number lies between the two whole numbers 1 and 2.