## Algebra 2 (1st Edition)

$70$
Here, we have $a_n= a_1 r^{n-1}$ for the Geometric series. The sum of an infinite Geometric Series can be found using: $S_n=\dfrac{a_1}{1-r}$ In the given problem it has been noted that the distance decreases by $80\%$ or, $0.8$. Thus, we have a first term $a_1=14$ and common ratio $r=0.8$ Therefore, we have $S=\dfrac{14}{1-0.8}$ Hence, $S=\dfrac{14}{0.2}=70$