Answer
See below.
Work Step by Step
a) By plugging in $x=3$ into the formula: $p(3)=22265(0.9)^{3}=\approx16231.2$
b) By plugging in $x=9$ into the formula: $p(3)=22265(0.9)^{9}=\approx8625.92$
c) The meaning of it is that after each year the car is worth $90\%$ of the value it was worth in the previous year.
