Solve the problem. A reasonable quadratic model for the population of a certain city is found to be 
where B(t) is the population (in thousands) of the city in the year that is t years since 1990. A reasonable quadratic model for the number of residents of that city who were born outside the United States is 
where F(t) is the number (in thousands) of foreign-born residents of the city in the year that is t years since 1990. Let P(t) be percentage of residents of the city who were born outside the United States in the year that is t years since 1990. An
equation for P is P(t) = 
. Use P to predict when the city will have 15.3% foreign-born residents.
A. 2008
B. 2006
C. 2007
D. 2009
Answer: D
Mathematics
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- 
= 
A. 
B. -2
C. 2
D. No solution
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A. -3
B. - 
C. - 
D. 
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