Solve.A country has a population of 8.7 million in 1995, a growth rate of 1.5% per year, and immigration from other countries of 46,000 per year. Predict the population in the year 2013.[Model the situation by using a differential equation of the form 
= ay + b with 
This differential equation has solution 
A. 11.1 million
B. 13.2 million
C. 12.3 million
D. 11.5 million
Answer: C
Mathematics
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Solve the problem.Find the hydrogen ion concentration of a solution whose pH is 7.5. Use the formula 
A. -8.75 x 10-1 B. 8.75 x 10-1 C. 3.16 x 107 D. 3.16 x 10-8
Mathematics
Is the function graphed one-to-one?
A. Yes B. No
Mathematics
Factor when possible. If the polynomial is prime, say so.x2 + 2x - 63
A. (x + 9)(x - 7) B. (x - 9)2 C. (x - 9)(x - 7) D. prime
Mathematics
Determine the direction in which the parabola opens, and the vertex.y = x2 - 4x + 3
A. Opens upward; (-2, -1) B. Opens to the right; (-1, 2) C. Opens upward; (2, -1) D. Opens to the right; (-1, -2)
Mathematics