While I was studying I downloaded and printed a previous old test which already answered I tried to re-solve the questions by myself but there is one question made me confused as I get a result mentioned in the options but the marked answer is different. I am talking about question 3 in the following picture 1. The problem statement, all variables and given/known data Vo= 0 m/s V= 20 m/s Xo= 0 m X= 800 m t= 25 s a= ? 2. Relevant equations 1) X = Xo + Vo t + 0.5 a t^2 2) V^2 = Vo^2 + 2 a (X-Xo) 3. The attempt at a solution I used the first equation X = Xo + Vo t + 0.5 a t^2 solution will be 800 = 0 + 0 (25) + 0.5 a (25)^2 800 = a 312.5 -a 312.5 = 800 -a = 800/312.5 = 2.56 then I took the square root of 2.56 and I got 1.6 m/s^2 So -a = -1.6 m/s^2 Is that right or no?