Provide an appropriate response.Find the special product: (a + 9)2
A. a2 +98a + 81
B. a2 - 81
C. a2 + 81
D. a2 + 18a + 81
Answer: D
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Solve.A population is growing at a rate proportional to its size. If the population is 121,000 after 11 years and 180,000 after 23 years, what was the original population size?
A. 80,713 B. 78,191 C. 75,668 D. 84,076
Solve the problem. Round your answer to 2 decimal places when necessary.A U.S. city with a population of 1.8 million reports 14,938 deaths. What is the death rate in deaths per 1000 people?
A. 12.05 deaths per 1000 people B. 8.3 deaths per 1000 people C. 83 deaths per 1000 people D. 0.83 deaths per 1000 people
Find the opposite (additive inverse) of the number.- 
A. 15
B. -15
C. 0
D. 
Use Descartes' rule of signs to find the number of possible positive, negative, and nonreal roots for the following equation.
?
?
A. 1 positive; 1 negative; 7 nonreal B. 1 positive; 0 negative; 8 nonreal C. 0 positive; 1 negative; 8 nonreal D. 0 positive; 0 negative; 9 nonreal E. none of these