12,108 round to nearest thousand

The answer is 12,000 because the 1(00) was not enough to raise it to 13,000.

12,502 would round to 13,000

The answer to your question is 12,000

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.