Final answer:
The accurate triggering point for the 'Config Brake' warning sound, based on the percentage of N1, cannot be determined from the provided unrelated information about car stopping distances and engine efficiency.
Step-by-step explanation:
The question pertains to the warning system within a vehicle or aircraft known as the "Config Brake" alarm, which is designed to alert the operator when the parking brakes are still engaged at certain engine power levels, indicated by the N1 percentage. The correct answer to the question "With the parking brakes on, 'Config Brake' will sound with N1 above:" is not provided in the context of the information given. The provided statements regarding car stopping distances, engine efficiency, and percentages do not directly correlate with the specifics of the 'Config Brake' system or the settings that would cause the alarm to sound. Therefore, without the appropriate aviation or vehicle manual or specific operational guidelines, it is not possible to confidently provide the correct answer from the options listed (a) 30% b) 40% c) 50% d) 70%.