Classify the function as a polynomial function, rational function, or root function, and then find the domain. Write the domain in interval notation.f(x) = 

A. root function; (-?]
B. root function; (-?? (?)
C. root function; (-?21? (21?)
D. root function; (-?21]


Answer: D

Mathematics

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Determine the standard equation of the ellipse described.Vertices at (5, -4) and (5, 8); length of minor axis is 6 units.

A.  +  = 1
B.  +  = 1
C.  -  = 1
D.  +  = 1

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Solve the problem.The logistic growth model  represents the population of a species introduced into a new territory after t years. What will the population be in 20 years?

A. 148 B. 290 C. 162 D. 303

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Solve area problem.The diameter of a discus is about 8.64 in. What is the area of one flat surface of the discus? (Round to the nearest hundredth.)(Use 3.1 4 for ? .)

A. 58.6 in.2  B. 27.13 in.2  C. 29.3 in.2 D. 234.4 in.2 

Mathematics