Solve the problem.The domain of a function f is [5, ?) and its range is [-6, ?). State the domain and the range of f-1.
A. The domain of a function f-1 is (-?, -5] and its range is (-?, -5].
B. The domain of a function f-1 is [- 
, ?) and its range is [
, ?).
C. The domain of a function f-1 is [-6, ?) and its range is [5, ?).
D. The domain of a function f-1 is [5, ?) and its range is [-6, ?).
Answer: C
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Multiply.
A. 31,900 B. 331,864 C. 319,102 D. 44,674
(2 + j3)(3 + j2) =
a. 13 + j0 b. 6 - j13 c. 1 + j7 d. 0 + j13 e. 6 + j13
Solve the problem.The accompanying graph shows the average number of degrees above/below normal in December from 2000 - 2009 where x = 0 represents 2000. 
Construct a polynomial of minimum degree that models the graph.
A. y = - 
x(x - 2)(x - 6)(x - 9)
B. y = 
(x - 2)(x - 6)(x - 9)
C. y = 
x(x - 2)(x - 6)(x - 9)
D. y = 
x(x + 2)(x + 6)(x + 9)
Find the missing value and write a conclusion.8% of what number is 20?
A. 8% of 250 is 20. B. 8% of 2500 is 20. C. 8% of 160 is 20. D. 8% of 25 is 20.