Given that Paul works for a company that deals in paints and dyes. He is paid a fixed monthly salary plus 15 percent commission on monthly sales over $20,000.
If Paul manages to achieve total monthly sales of $x, which is over $20,000, the function f(x) representing Paul's monthly sales over $20,000 is given by:
[tex]f(x)=x+20000[/tex]
If x is the sales amount over $20,000, the function g(x) giving Paul's commission is given by
[tex]g(x)=15/100 of x=0.15x[/tex]