Question

For a track and field athlete who can jump vertically, his distance above the ground is given by the formula s = 3.3t - 4.9t2. What is his initial velocity?

velocity in m/s =

My Answer

S'= 3.3-9.8t
S'(0) = 3.3
velocity in m/s = 3.3

Can you please confirm this answer
Thanks