A rabbit runs in a garden such that the x- and y- components of its displacement as function of times are given by x(t) = -0.45 t2 - 6.5 t + 23.3 and y(t) = 0.35 t2 + 8.3 t + 49.9. (Both x and y are in meters and t is in seconds.)
Calculate the rabbit's acceleration vector at t = 7.82 s. [First enter the x-component, then the y-component (in units of m/s2).]