In this problem
we have an exponential decay function of the form
[tex]y=a(1-r)^x[/tex]where
y is the value of the car
x is the number of years
a is the initial value
r is the rate
we have
a=$30,319
r=10%=10/100=0.10
substitute given values
[tex]\begin{gathered} y=30,319(1-0.10)^x \\ y=30,319(0.90)^x \end{gathered}[/tex]For x=2 years
substitute
[tex]y=30,319(0.90)^2[/tex]