Final answer:
You should not park more than 18 inches away from the curb when parallel parking. Approximately 8.25 out of 22 cars can be found parked crookedly in a certain parking garage. Safety when crossing the street depends on individual judgment and traffic conditions.
Step-by-step explanation:
When parallel parking, you should not park more than 18 inches away from the curb or edge of the roadway. Regarding the other parts of the question, on any given day, for every 22 cars surveyed in the De Anza parking garage, there are approximately 8.25 cars parked crookedly, since 37.5 percent of cars are parked this way. For the probability that at least 10 of the 22 cars are parked crookedly, the option provided does not contain enough information to determine a correct answer based on the details given. When considering safety while crossing the street, the specific distance in car-lengths before it is safe to cross depends on various factors such as the speed of the car and visibility. It's essential to ensure that a car is at a sufficient distance to allow you to cross safely, which could be subjective based on individual judgment and specific traffic conditions.