Using the law of sites or cosines to find Angle C​

Which of the functions graphed below has a removable discontinuity?

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.

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.