At the hospital , nurse work 8 hour shifts . to have nurses work 8 hour shifts . to have nurses on duty 24 hours per day . how many shifts need to be filled each week

21 shifts

Explanation:

If you want to have nurses on duty 24 hours a day 8 hours at a time, first divide 24 by 8. You get 3, which is the amount of shifts per day. Then multiply 3 by the amount of days in a week, 7, and get 21 shifts per week. Hope this helps!