Determine what m and b represent.The population, in millions, of a city t years after 2010 is given by 
A. 2.8 million is the population of the city in 2010 and 2.87 million is the population in 2011.
B. 2.8 million is the population of the city in 2010 and 0.07 million is the decrease per year in the population.
C. 0.07 million is the population of the city in 2010 and 2.8 million is the increase per year in the population .
D. 2.8 million is the population of the city in 2010 and 0.07 million is the increase per year in the population .
Answer: D
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A. -5 B. 625 C. 5 D. not a real number
Find the center (h, k) and the radius r of the circle.x2 + y2 + 8x - 18y + 97 = 81
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How long will it take $1,400 to double itself if it is invested at 8% interest compounded semiannually? Please round the answer to the nearest tenth.
A. 8.8 years B. 11.8 years C. 9.3 years D. 7.8 years E. 9.8 years
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