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 $42,341.
A. x ? 1993
B. x ? 1997
C. x ? 1995
Answer: C
Mathematics
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Sketch D and g(D) from the description of D and change of variables 
u = xy, v = 
where D is the rectangle 1 ? x ? 4, 
? y ? 2
?
A.
 ? |  |
B.
 ? |  |
C. None of these.
D.
 ? |  |
Mathematics
Rewrite the fractions as equivalent fractions with the given LCD.
and 
LCD: 36
A. 
; 
B. 
; 
C. 
; 
D. 
; 
Mathematics
Solve the problem.The accompanying tables represent a function f that converts seconds to hours and a function g that converts hours to days.
Express (f -1?g -1)(x) symbolically.
A. (f -1?g -1)(x) = 86,400x2
B. (f -1?g -1)(x) = 
C. (f -1?g -1)(x) = 
D. (f -1?g -1)(x) = 86,400x
Mathematics
Identify the coefficients of the polynomial.2n3 - 2n2 - n
A. 2, 2, -1 B. 2, -2, 1 C. 2, 2, 1 D. 2, -2, -1
Mathematics