1. The problem statement, all variables and given/known data A kangaroo jumps to a vertical height of 2.8m. How long was it in the air before returning to Earth? 2. Relevant equations delta y= Vot + 1/2at^2 3. The attempt at a solution I had to get t by itself so I rearranged the equation to say: t= delta y/.5(9.8) all under a square root. First off, I'm not sure if I set up the equation correctly, and secondly, I am not sure if just the top (delta y) goes under the square root or both the top and bottom(or the whole side of the equation) goes under the square root.