Waiting for your answers... Answer the following work problem. Report your answer to the nearest tenth of a minute. Mary can do a certain job in 6 minutes. Robert can do the same job in 11 minutes.Mary and Robert work together to complete the same job. However, Mary starts working 4 minutes after Robert starts to work. How many minutes will it take for them to complete the job once Robert starts to work? minutes

Mary can do a certain job in 6 minutes. Robert can do the same job in 11 minutes.Mary and Robert work together to complete the same job. However, Mary starts working 4 minutes after Robert starts to work. How many minutes will it take for them to complete the job once Robert starts to work?