Write the expression in the standard form a + bi.
2
A. 
B. i
C. -i
D. - 
Answer: B
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Suppose the time intervals in seconds between arrivals of successive cars at an expressway tollbooth during rush hour are exponentially distributed with associated probability density function 
. Find the probability that the average time interval between arrivals of successive cars is more than 9 sec. Round your answer to four decimal places.
?
A. 0.1929 B. ?0.5564 C. ?0.9403 D. ?0.2366 E. ?0.0498
Find the opposite, or additive inverse.19
A. -19 B. -1 C. 0 D. 19
Solve the pair of linear equations by addition.
If there is one common solution, select the correct ordered pair of the point of intersection. If there is no one common solution, select either parallel or coincide for the correct answer.
A. 
B. 
C. 
D. The lines are parallel.
E. The lines coincide.
Graph the function.f(x) = ex - 6
A. 
B. 
C. 
D. 