Tailor

use y= Vyi + 1/2 ayt^2 set y=0, and Vyi = 12.5 Solve for Time. v=d/t where v= velocity of car and t= time you obtained from previous equation. Solve for d and you get your answer

Asymtote is at y=-9 . Remember for Exponential functions you can tell the aymptote by looking at the value which gives the Vertical translation up or down. In this case the vertical translation is 9 units down so therefore the asymptote is y=-9.