I always remembered it as the 's' (for supplementary) is farther than 'c' (for complementary) in the alphabet just like 180 degrees is farther than 90 degrees
so supplementary is 180 degrees complementary is 90 degrees
Step-by-step explanation: you would first subtract the 3 from 9 for a basic fee. And after you would decide 6 by .40 and you would end up traveling 15km
