Askateboarder traveling at 10.4 m/s starts getting chased by a grumpy dog. the skateboarder speeds up with a constant acceleration for 39m over a 3.3s. we want to find the acceleration of the skateboarder over the 3.3s time interval. which kinematic formula would be most useful to solve for the target unknown? picture shows answer choices better. a. v= vo+a(t) b. x= (v+vo/2)t c. x= vo(t)+1/2at^2 d. v^2 = vo^2 +2ax e. x= vt-1/2at^2