Answer:
8:30 a.m.
Explanation:
The total time it takes for Lyle to reach his friend's house is 720/80 + 1 + 0.25 * 2, which is 9 + 1.5 = 10.5 hours
The latest possible time that Lyle would be able to leave his house to reach on time is 8:30 a.m.
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