Final answer:
When parking on the street, your vehicle must not be more than 18 inches from the curb. For safe crossing estimates at 60 km/h, a distance of approximately 33.34 meters, or 9.5 car lengths, is required. When considering the number of cars parked crookedly in a lot, 8.25 out of 22 is the expected number, with a probability of 0.1607 that at least 10 are crooked.
Step-by-step explanation:
When parking your vehicle along the street, you should be facing the direction of traffic on that side of the road, parallel and not more than 18 inches from the curb. This is option d) 18 inches from the curb. The correct distance from the curb is critical for maintaining the flow of traffic and ensuring safety for all road users, including pedestrians.
Regarding the passage about crossing the street
- Considering the speed limit of 60 km/h, and needing at least 4 meters to safely cross in front of a car, you would calculate the time it takes for a car to cover this distance at a given speed. If we translate the speed into meters per second (60 km/h is approximately 16.67 m/s), the distance needed to be covered before it is safe to cross would be the speed of the car multiplied by the time you need to cross safely. If you can cross the road in 2 seconds, you would need a minimum of 33.34 meters to cross safely, which is roughly 9.5 car lengths considering the average car length of 3.5 meters.
- To answer the next question, if a car is 28 meters away, it would cover this distance in approximately 1.68 seconds at 60 km/h, which might not be enough time for you to safely cross 4 meters, hence it wouldn't be safe to cross.
Regarding the probability calculations for parking
For every 22 cars, 8.25 cars are expected to be parked crookedly, as per the 37.5 percent given rate, which is option A. 8.25. To find the probability that at least 10 of the 22 cars are parked crookedly, you would use binomial probability calculations. The given probability of 0.1607 (B option) would represent the calculated chance for this event based on the provided rate and sample size.