The price of a car will decrease by [[$ 15 \% $]] per year. The price after [[$ t $]] years can be calculated by using the expression [[$ 0,85 ^{t} \cdot a $]] , where [[$ a $]] is the price of the car as new. What is the price of a car that originally cost [[$ 18 000 $]] QAR after three years? What is the value of a car in [[$ 10 $]] years?



The price of the car after three years is QAR, and price of the car after ten years is QAR.