Final answer:
To find the car's average speed up until t = 0.5 hour, you need the distance covered in that time. The formula is total distance divided by total time. Without specific distance data at 0.5 hours, we can't calculate it.
Step-by-step explanation:
To calculate the average speed of a car from the beginning of the trip until time t = 0.5 hour, you need to know the total distance the car traveled during that time and the total time taken.
Since we're not given specific information about the distance traveled in 0.5 hours, we can't provide a numerical answer.
However, if you have a graph showing distance versus time for the car's trip, you can find the position of the car at t = 0.5 hour and calculate the average speed using the formula:
average speed = total distance / total time
For example, if a car travels 150 kilometers in 3.2 hours, we calculate the average speed as follows:
Vavg = distance / time = 150 km / 3.2 h = 47 km/h.