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The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

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 unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters