Solve the problem.Median family income in Country X between 1990 and 1999 can be modeled by 
where x is the year. Determine symbolically when the median income was $42,477.
A. x ? 2000
B. x ? 1994
C. x ? 1998
D. x ? 1996
Answer: D
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Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 1; local maximum at x = -1; concave down on (0, ?); concave up on (-?, 0) B. Local minimum at x = 1; local maximum at x = -1; concave up on (-?, ?) C. Local minimum at x = 1; local maximum at x = -1; concave down on (-?, ?) D. Local minimum at x = 1; local maximum at x = -1; concave up on (0, ?); concave down on (-?, 0)
Solve the equation.31 + 2x = 27
A. {1} B. {9} C. {-1} D. {3}
Graph the function.f(x) = 5(x + 3) - 3
A. 
B. 
C. 
D. 
Find the composite function for the given functions and state the domain. f ? g for f(x) = x2 - 16 and g(x) = 
A. 
- 16, for all x
B. x - 16, for x ? 0
C. 
, for (-?, -4] ? [4, ?)
D. x - 4, for x ? 0