Answer
$\$6103.11$
Work Step by Step
We know that $a_n=a_1r^{n-1}.$
where $r$=common ration (we can get this by dividing any two consecutive terms) and $a_1$= the first term
Here $a_1=\$31000$ and $r=0.85$ (because of the $15$ percent price decrease), hence $a_{10}=a_1(r^{10-1})=\$31000(0.85^9)=\$6103.11$
