When two pipes fill a pool together, they can finish in 5 hours. if one of the pipes fills half the pool then the other takes over and finishes filling the pool, it will take them 18 hours. how long will it take each pipe to fill the pool if it were working alone?

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.

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