Adrag racer crosses the finish line at 132m/s what was the racers acceleration of his time was 3.94s

Acceleration = (change in speed) / (time for the change)

Change in speed = (speed at the end) - (speed at the beginning).

Change in speed = (132 m/s) - (zero m/s) = 132 m/s

Acceleration = (132 m/s) / (3.94 s)

Acceleration = (132/3.94) m/s²

Acceleration = 33.5 m/s²  (about 3.4 G's)

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.