The cumulitive number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-29x^2+870x+11629, where x=1 corresponds to 2000, x=2 corresponds to 2001, and so on until x=11corresponds to 2010.

(a)Find the number of cumulative car accidents in 2003
Use a table of values to estimate the year in which the cumulative number of car accidents reached 16700. The number of car accidents reached 16700 in about which year?

Question

The cumulitive number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-29x^2+870x+11629, where x=1 corresponds to 2000, x=2 corresponds to 2001, and so on until x=11corresponds to 2010.

(a)Find the number of cumulative car accidents in 2003
Use a table of values to estimate the year in which the cumulative number of car accidents reached 16700.  The number of car accidents reached 16700 in about which year?

anonymous · Answer

plug in x=4 for 2003

anonymous · Answer

do you have a graphing calculator

anonymous · Answer

no

anonymous · Answer

hold on a sec

anonymous · Answer

thank you been stuck on this one

amistre64 · Answer

http://www.wolframalpha.com/input/

anonymous · Answer

attachment

anonymous · Answer

attachment

anonymous · Answer

do you understand how to look at the years for the output

anonymous · Answer

thx

anonymous · Answer

so did you get 14,645 for 2003 (x=4) and it will reach around 16,600 when x=8, year 2007

anonymous · Answer

you're welcome...medal please ; )

anonymous · Answer

you can just substitute values for x when doing it by hand