1. The problem statement, all variables and given/known data What's the cliff's height (m) if a fallling boulder takes 1.3 s to fall the last 3rd of the way to the ground? Air resistance is ignored, and the problem requires a quadratic formula. 2. Relevant equations I think it's the constant x-acceleration formulas, which I can't type here because of the super subscripts/ subscripts. 3. The attempt at a solution Actually, I don't even know how to begin this or set this up. =/ How do I solve this equation and determine which one of the given answers is correct? The answers in my textbook says it's either 246 m and 2.51 m, but how do I solve to get them?