A car is projected directly up an incline and its location from its start point is given by the formula

s = 9t - 5t2. Determine its initial velocity and initial acceleration.

initial velocity in m/s =
initial acceleration in m/s2 =

My Answer

s'=9-10t

initial velocity in m/s = 9

S"= -10
initial acceleration in m/s2 = -10

Can you please confirm this..
thanks!