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Answer the following work problem. Report your answer to the nearest tenth of a hour.

Juan can do a certain job in 11 hours. Juanita can do the same job in 5 hours. Juan and Juanita work together to complete the same job. However, Juan starts working 2 hours after Juanita starts to work. How many hours will it take for them to complete the job once Juanita starts to work? hours