Given f(x) and g(x), find the indicated composition and state its domain.f(x) = x2 - 6, g(x) = 2x + 4Find (f ? g)(x).
A. 2x2 - 8, all real numbers
B. 4x2 + 16x + 16, all real numbers
C. 4x2 + 16x + 10, all real numbers
D. 4x2 + 8x + 10, all real numbers
Answer: C
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Solve the problem.Doctors use the rational expression 
to determine the dosage of a drug prescribed for children. In this expression, A = child's age and D = adult dosage. What is the difference in the child's dosage for an 8-year-old child and a 4-year-old child? Express the answer as a single rational expression in terms of D.
A. 
D
B. 
D
C. 14D
D. 
D
Solve.
= 
A. x = 9
B. x = 3
C. x = 8
D. x = 8
Find the median of the set of numbers.19.6, 19.9, 18.4, 18.6, 19.6, 18.5
Round to the nearest hundredth when necessary.
A. 18.6 B. 38.2 C. 19.1 D. 19.6
Use the properties of logarithms to evaluate the expression without the use of a calculator.log3 310
A. 30 B. 3 C. 1 D. 10