Expression 2: "f" left parenthesis, "x" , right parenthesis equals 63 left parenthesis, 1 minus "r" , right parenthesis Superscript, "x" , Baseline minus left parenthesis, "x" times 3.1 7 0 9 8 times 10 to the negative 8th power , right parenthesisfx=631−rx−x·3.17098·10−8