The ratio of the area of a circle to the circumference of the circle () is . find the circumference of the circle. leave your answer in terms of pi.

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.