Answer:
7 1/2
Explanation:
ok so i always try to make thing easier for my self so i just do something like this.
3/4 + 3/4 = 1 1/2
so you could just go and say
1 1/2 + 1 1/2 + 1 1/2 + 1 1/2 + 1 1/2 = 7 1/2
i dont know if you want like make it take exactly 7 hours but um thats my explanation.