1. The problem statement, all variables and given/known data With what speed (in feet/second) must a ball be thrown vertically upward in order to rise to a height of 85.0 ft, neglecting air resistance? 2. Relevant equations g=9.8 m/(s^2) speed=distance/Δt 3. The attempt at a solution I started off by setting speed=85.0ft/Δt I understand I need to find the time duration. I converted 85 ft to 25.908m. Now I was thinking of multiplying 9.8 m/(s^2) by (1/25.908m) but that leaves me with seconds squared. Am I missing a general formula for this problem? It seems like I don't have enough information at this point. Thank you to anyone who can offer me any suggestions.