9.
two motorcycles start at the same point. one motorcycle travels 15km due north and stops.
the second motorcycle travels 32 km due west and stops. which value is closest to the
distance between the motorcycles when they stop?

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.