1. The problem statement, all variables and given/known data A motorcycle has a constant acceleration of 2.80 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction. How much time is required for the motorcycle to change its speed from (a)40.9 to 50.9 m/s, and (b)70.9 to 80.9 m/s? 2. Relevant equations Vf = Vi + a*t 3. The attempt at a solution using that kinematic formula, for a) 50.9=40.9+2.8*t then divide both sides by 40.9+2.8 to solve for t answer = 4.04 and same thing with b) but in both cases the answer is coming up as wrong. what have i done wrong?