[Potironette]

I solved h to be 246 m based on the time being 7.08 s (since it couldn't have been .716 s because the total time was over 1.30 s).

But what I'm uncertain about is what the .716 s means. Although, I guess maybe .716 s might actually not in the future because when I solved for t, I got it from:
t² = 3/2(t-1.30 s)², and .716 s - 1.30 s < 0 ? Maybe since 7.08 s - 1.30 s is the time it took for the boulder to fall 2/3rds of the way, .716 s - 1.30 s is how long it would have taken the boulder to get to that same 2/3rds mark had the boulder been allowed to fall through the ground 2/3rds(I'm not sure exactly at what point) more then have time be rewound so the boulder would look like it was falling up from through the ground?? (All I remember from class about negative times was something about falling differently...granted this wasn't exactly a negative time, but even if I had considered the ground to be zero, I think the negative numbers would have canceled each other out?)