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OpenStudy (anonymous):
The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-43x^2 + 1720x + 14,663, where x=1 corresponds to 2000, x=2 corresponds to 2001, and so on until x=11 corresponds to 2010. (a) Find the number of cumulative car accidents in 2005. (b) Use a table of values to estimate the year in which the cumulative number of car accidents reached 19,400.
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