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

Tammy can do a certain job in 8 minutes. Thadeus can do the same job in 5 minutes. Tammy and Thadeus work together to complete the same job. However, Tammy starts working 1 minutes after Thadeus starts to work. How many minutes will it take for them to complete the job once Thadeus starts to work? minutes