The heights of students are normally distributed with a mean of 64 inches and a standard deviation of 3 inches. Find the area under the curve for heights between 58 and 78 inches (no links please!)

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.