---

Waiting for your answers...

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

Robert can do a certain job in 7 minutes. Thadeus can do the same job in 8 minutes. Robert and Thadeus work together to complete the same job. However, Robert starts working 4 minutes after Thadeus starts to work. How many minutes will it take for them to complete the job once Thadeus starts to work? minutes