Question 962271
1.The median income in dollars of U.S households from 2000 to 2007 can be approximated by the model:I=187.65t^2-119.1t+42,013,0<=t<=7 where t represents the year,with t=0 corresponding to 2000
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{{{graph(400,400,-10,10,-51000,50000,187.65x^2-119.1x+42013, 45000)}}}
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 Graph this model,then use the graph to determine in which year the median reaches or surpassed $45,000.
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Ans: 4.32 years;; rounding you get "the 4th year"
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Cheers,
Stan H.