Answer: The answer is 35/4 or to keep it simple, 8 3/4 hours.
Explanation:
You can do 5/1 times 1 3/4 which is 5/1 · 7/4
5/1 · 7/4 = 35/4
35/4 hours, 8 3/4 hours and 8.75 hours are all correct
I hope this helps :)
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