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
Answer: E
Mathematics
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Several computer stores reported differing prices for a toner cartridge for a laser printer. The prices are as follows: 51, 55, 77, 79, 72, 76, 58, 57, 79. Find the mode of the prices for a toner cartridge.
A. $78 B. $79 C. $80 D. $81 E. $77
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Use the definite integral to find the area between the x-axis and the graph of f(x) over the indicated interval.F(x) = x-(1/2); [1, 4]
A. 
B. 
C. 4
D. 2
Mathematics
Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to three decimal places. log4.8228
A. 47.500 B. 0.289 C. 3.461 D. 2.358
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Plot the point and state the quadrant, if any, in which the point is located.(0, 5)
A. x-axis
B. y-axis
C. Quadrant I
D. y-axis
Mathematics