Of the 40 students in Mr. Clayman's music class, 30 sing in the school choir. Express the part of the class that sings in the choir as
a fraction.
a. 2/5 b. 3/10 c. 30/100 d. 3/4

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.