The function f(x)\displaystyle {f{{\left({x}\right)}}} has a domain of all real numbers, is an even function, is periodic and has a period of p=40\displaystyle {p}={40}. A partial segment of the graph of f(x)\displaystyle {f{{\left({x}\right)}}} is shown below.
246810121416182024-2-4
Find the following values:
f(20.2)=\displaystyle {f{{\left({20.2}\right)}}}=  
f(44.4)=\displaystyle {f{{\left({44.4}\right)}}}=  
f(550.6)=\displaystyle {f{{\left({550.6}\right)}}}=