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Every year on Earth Day, a group of volunteers pick up the garbage at Hidden Falls Park. The time it takes to clean the beach

Every year on Earth Day, a group of volunteers pick up the garbage at Hidden Falls Park. The time it takes to clean the beach varies inversely with the number of people picking up garbage. last year , 33 volunteers took 7 hours to clean the park. IF 57 volunteers come to pick up garbage this year how long will it take to clean the park?

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