I’m not sure which one is the right answer

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

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.

What’s the volume of the triangular prism?