<PRE><B>Question 413389</B>
1 can = 3 hours
4.5 hours/day for a week is needed for 680 tvs

Find total number of hours needed first.

hours per day * days per week * number of tvs
4.5 * 7 * 680 = 21420

21420 is the total hours needed

take total hours and divide by 3 gives you total cans needed to be recycled.

21420/3 = 7140 is the total number of cans needed.

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