Mathematics, 07.12.2020 18:40, aaroneduke4576

The swimming pool is open 7 1/2 hours a day. One lifeguard is on duty at a time, each working a 1 1/2 hour shift. How many lifeguards are needed per day?

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The swimming pool is open 7 1/2 hours a day. One lifeguard is on duty at a time, each working a 1 1/...