A rectangular water tank has the following dimensions: length = 2x
width = 2x - 6
height = x + 1

What is the volume of the tank expressed as a polynomial?

4x2 - 12x

2x2 - 4x - 6

4x3 - 8x2 - 12x

4x3 - 16x2 + 12x

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.