Here, given the monthly payment formula as:
[tex]M=\frac{Pr(1+r)^n}{(1+r)^{-1}}[/tex]Given an interest rate of 4.8%, the value you would put for r is:
r = 4.8%
SImplify 4.8%:
[tex]\frac{4.8}{100}=0.048[/tex]The value to input as r which is rate is 0.048