Respuesta :

Answer:

The answer is ten and a half hour.

Step-by-step explanation:

Because if you add eight and a half and two and a half, youll get ten and a half hour.

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You take the 2.5 hours from the start the. You add your 8.5 hours when you add 2+8= 10 and .5+.5 and get 1 10+1= 11

2.5+8.5= 11