The function f is one-to-one. Find its inverse.f(x) = 
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = 
Answer: A
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Solve the system by elimination.
A. (-5, 8) B. (8, -5) C. (5, 7) D. (-4, 7)
Multiply.(b + 4)(b - 2)
A. b2 - 2b + 8 B. b2 + 2b - 8 C. 2b - 8 D. 2b2 + 8
Solve the problem.The cost function for the manufacture of graphing calculators is given by 
where x is the number of graphing calculators manufactured. Using the appropriate domain, sketch the graph of the average cost 
to manufacture x graphing calculators. Find the absolute minimum on the graph of 
. What do the coordinates of the absolute minimum tell us?
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A. The absolute minimum is at (31,622.78, 31.11). This tells us that the average cost of a graphing calculator is minimized at $31.11 per calculator when approximately 31,623 are produced.
B. The absolute minimum is at (34,825.23, 29.32). This tells us that the average cost of a graphing calculator is minimized at $29.32 per calculator when approximately 34,825.23 are produced.
C. The absolute minimum is at (31,622.78, 29.32). This tells us that the average cost of a graphing calculator is minimized at 
per calculator when approximately 31,623 are produced.
D. There is no absolute maximum.
Find the standard deviation of the data summarized in the given frequency table.A company had 80 employees whose salaries are summarized in the frequency table below. Find the standard deviation. 
A. 8600.4 B. 7963.3 C. 8361.5 D. 8839.3