Answer
$d(t)=3000-25t$
Work Step by Step
The initial distance between you and the park is $3000$ ft. Each second you travel $25$ ft, so the distance $d(t)$ between you and the park after $t$ seconds is:
$$d(t)=3000-25t.$$
Graph the equation from $t\geq 0$ and until the distance reaches the value $0$:
