Classify the following as the equation of a parabola, a circle, an ellipse, or a hyperbola.25y2 - 9x2 - 225 = 0
A. Hyperbola
B. Parabola
C. Ellipse
D. Circle
Answer: A
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Solve.A country has a population of 9.6 million in 1995, a growth rate of 1.3% per year, and immigration from other countries of 46,000 per year. Predict the population in the year 2015.[Model the situation by using a differential equation of the form 
= ay + b with 
This differential equation has solution 
A. 12.2 million B. 14.7 million C. 14.4 million D. 13.5 million
Use series to evaluate the limit.
x3
A. - 
B. - 
C. - 
D. - 
Factor completely. If unfactorable, indicate that the polynomial is prime.4d4 - 1
A. (2d2 - 1 )2 B. (2d2 + 1 )2 C. (2d2 + 1)(2d2 - 1 ) D. prime
Solve the problem.Deer, rabbits, and bears eat grass. Wolves, pumas, and humans eat deer and rabbits. Bears also eat deer and rabbits. Draw a directed graph to model this food chain.
A.
B.
C.
D.
