9514 1404 393
Answer:
 t < 8
Step-by-step explanation:
The total fee for t hours is ...
 13 +4t
The Chemistry Club wants this t be less than $45, so the restriction on t is ...
 13 +4t < 45
 4t < 32
 t < 8
The Chemistry Club could rent the room for less than 8 hours.