1. The problem statement, all variables and given/known data The position of a particle moving along the x axis depends on the time according to the equation x = ct4 - bt8, where x is in meters and t in seconds. Let c and b have numerical values 2.4 m/s4 and 1.9 m/s8, respectively. From t = 0.0 s to t = 1.3 s, (a) what is the displacement of the particle? Find its velocity at times (b) 1.0 s, (c) 2.0 s, (d) 3.0 s, and (e) 4.0 s. Find its acceleration at (f) 1.0 s, (g) 2.0 s, (h) 3.0 s, and (i) 4.0 s. 2. Relevant equations x = ct4 - bt8 v= disp/time v=vo + at 3. The attempt at a solution i got part a correct, i know the displacement is -8.64 meters what i'm really having trouble with.. is the idea that the problem clearly states that the time interval is 0 to 1.3 seconds.. and then it asks you to find velocity and acceleration for up to 4 seconds. how is this done? i know that you can't just do v= disp/time using -8.64 meters/1 second for part b, because it said the answer was wrong. please help?