A car is rolling backward when it hits the gas. After 8.25 s, it is moving forward at 8.62 m/s,
and is 12.9 m to the right of its starting point.
What was its starting velocity?

The given data is as follows.

       Final velocity (v) = 8.62 m/s,         Initial velocity () = ?

        time = 8.25 sec,          distance (s) = 12.9 m

                             = -5.49 m/s

Thus, we can conclude that starting velocity of the car is -5.49 m/s.

Explanation:

if they have a finite resultant

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19