Matrices C and D are shown below. 2
1
0
a
b
-0.4
C= 0 3
4
D=0
-0.2
0.8
0
2
1
O
0.4
-0.6
What values of a and b will make the equation CD = I true?
a=0.5
b=0.1
O a=0.1
b=0.5
a=-0.5
b=-0.1
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Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.