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; (-?, 18]
B. root function; (-?, 3
]
C. root function; (-?, 18) ? (18, ?)
D. root function; (-?, 3
) ? (3
, ?)
Answer: A
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Use counting rules to determine the probability.A committee of 5 members is voting on a proposal. Each member casts a yea or nay vote. On a random voting basis, what is the probability that the final vote count is unanimous?
A. 
B. 
C. 
D. 
Integrate the function.
dt
A. - 
5+ sec-1
+ C
B. - 
5+ C
C. - 
5+ C
D. - 
Write an equation that expresses the relationship. Use k as the constant of variation.g varies directly as the square of t.
A. g = 
B. g = kt2
C. g = 
D. g = k
The reliability of a new model of CD player can be described by the exponential function 
where the reliability R is the probability (as a decimal) that the CD player is still working t years after it is manufactured. Round the answer to the nearest hundredth. Then write your answer as a percent.What is the probability that the CD player will still work 4 years after it is manufactured?
A. 9% B. 2% C. 92% D. 27%