Final answer:
The acceleration of the car slowing down from 29 m/s to a full stop over 7.0 seconds is 4.14 m/s². This is a deceleration because it is in the opposite direction of the car's motion.
Step-by-step explanation:
When you are driving at 29 m/s and you slow down to a full stop as you approach a red light, taking 7.0 seconds to come to a complete stop, you can calculate your acceleration using the formula:
a = Δv / Δt
where Δv is the change in velocity and Δt is the time taken. Since you're coming to a stop, your change in velocity is the initial velocity, which is 29 m/s. The time taken is 7.0 seconds. Plugging in the values:
a = -29 m/s / 7.0 s = -4.14 m/s²
The negative sign indicates that the acceleration is in the direction opposite to the motion, which is expected since you're coming to a stop.
Therefore, the correct answer is: b) 4.14 m/s².