Answer:
8 hours.
Step-by-step explanation:
An Equation can be created:
y = 38 + 6.30t ("t" denotes time taken in hours and "y" amount cost)
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Solve for t, given amount cost: $88.40
38 + 6.30t = 88.40
6.30t = 88.40 - 38
6.30t = 50.4
t = 50.4/6.3
t = 8
So, they can use the meeting room for 8 hours.