A very large tank initially contains of pure water. Starting at time a solution with a salt concentration of is added at a rate of the solution is kept thoroughly mixed and is drained from the tank at a rate of answer the following questions.

answer: the mildest forms of push polling are designed merely to remind voters of a particular issue. for instance, a push poll might ask respondents to rank candidates based on their support of an issue in order to get voters thinking about that issue. many push polls are negative attacks on other candidates.