1. The problem statement, all variables and given/known data A stone is tossed vertically upward with an initial velocity of 23 ft/s from the top of a 15 ft building. (a) What is the height of the stone after 0.12 s? (b) Find the velocity of the stone after 3 s. (c) When does the stone hit the ground? 2. Relevant equations s(t) = s0 + v0t - (1/2)g*t^2 v(t) = v0 - g*t 3. The attempt at a solution (a) s(t) = 15 + (23)(0.12) - (1/2)(32)(0.12^2) = 17.5296 (b) v(t) = 23 - 32(3) = -73 (c) 0 = 15 + 23t - (1/2)(32)t^2 0 = 16t^2 - 23t -15 Parts (a) and (b) are correct. I am only have problems with part (c). Whenever I solve this my answer comes up incorrect. Either my math is wrong is I'm simply not working it correctly. Any help is appreciated.