Final answer:
The car with an initial velocity of 100 MPH and a negative acceleration of -2.4 m/s² is slowing down after traveling 75 meters, hence option D is correct.
Step-by-step explanation:
The student's question relates to the concepts of velocity and acceleration in physics. The car begins with an initial velocity of 100 MPH (which needs to be converted to meters per second for consistency with the given acceleration value) and has a negative acceleration, indicating that it is slowing down. We are asked what is true after the car has traveled a distance of 75 meters.
Given the fact that the acceleration is negative, option D is the correct answer: the car is slowing down. Negative acceleration (or deceleration) means that the velocity of the car is decreasing over time. Therefore, options A (constant velocity), B (specific time traveled), and C (final velocity greater than initial velocity) are incorrect based on the provided information.
Acceleration plays a crucial role in determining the final velocity of a vehicle. As the car has a negative acceleration, we can conclude without calculations that the velocity is decreasing, and thus, the car is decelerating.