1. The problem statement, all variables and given/known data The position x of an object as a function of time is given as x = 2.257 + 4.894 t + 16.5 t2. All quantities are understood to be quoted in SI units. What is the initial velocity ? Indicate with a negative (positive) sign whether the acceleration is constant (not constant) for the given expression. 2. Relevant equations i think i have to use. x=x0+v0(t)+1/2(a)t^2) 3. The attempt at a solution the problem is confusing me becuase im not sure what numbers should go where in the equation. i know the initial velocity is v0.