Use a graphing calculator to graph the piecewise-defined function, using the window indicated.f(x) = 
; window [-4, 4] by [-4, 4]
A. 
B. 
C. 
D. 
Answer: D
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Find a formula for the nth term of the sequence.The sequence 0, -1, 0, 1, 0, -1, 0, 1, . . . (0, -1, 0, 1 repeated)
A. an = sin(n?)
B. an = cos(n?)
C. an = cos
D. an = sin
Solve the absolute value equation.|2x + 2| = 22
A. x = 10 B. x = -12 C. x = -12, 10 D. x = -10, 12
Solve the problem.Find the value of k so that the graph of 13y + kx = 4 and the line containing the points (5, -8) and (2, 4) are parallel.
A. k = 50 B. k = 53 C. k = 52.5 D. k = 52
A study conducted by Uni-Mart, a mail-order department store, reveals that the time intervals in minutes between incoming telephone calls on its toll-free 600 line between 9 A.M. and 2 P.M. are exponentially distributed with probability density function 
. What is the probability that the time interval between successive calls is more than 6 min? Round your answer to four decimal places.
?
A. 0.4899 B. ?0.8869 C. ?0.2950 D. ?0.1737 E. ?0.8981