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
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Use the information in the table to answer the question.
Which category in 1992 represents the greatest increase?
A. Decorations B. Supplies C. Awards D. Telephone
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
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
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