A bag contains 5 purple buttons, 12 blue buttons and 3 green buttons. A single button is randomly chosen. What is the probability you select a blue button, replace it, and then select a green button?

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.