Answer
No, because the value of the car would be about $5242, which means they would be selling the car for less than it was worth.
Work Step by Step
The equation for determining the car's value will look like this:
f(x) = 20,000(1-0.2)$^{x}$
To find how much the car would be worth after years, plug in 6 for x:
f(x) = 20,000(1-0.2)$^{x}$
f(6) = 20,000(1-0.2)$^{6}$
f(6) = 20,000(0.8)$^{6}$
f(6) = 20,000(0.262144)
f(6) = 5242.88 $\approx$ $5243
