Final answer:
Common regulations require a car to be parallel parked within 12 to 18 inches of the curb, although this can vary by location so checking local traffic laws is recommended for the specific standard.
Step-by-step explanation:
The standard for parallel parking distance from the curb can vary by location, but a common requirement is to be within 12 to 18 inches of the curb. Regulations may differ depending on the city or state jurisdiction, so it's important to check local traffic laws for specific rules. In some places, the measurement may be specified in other units, so converting to inches may be necessary for understanding the local standard. The question about how many inches you must be parallel parked from the curb falls under the category of practical mathematics, as it involves measurements and understanding local regulations.