You are in a bike race. when you get to the first checkpoint you are 2/5 of the distance away to the second checkpoint. when you get to the second checkpoint you are 1/4 of the distance to the finish. what is the distance from start to check point 1?

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.