Mathematics, 12.03.2020 18:36 morganhines181
The time to failure of fluorescent lights in a large office building is exponentially distributed with a failure rate of 0.03125/hr. How many spare tubes must the building custodian maintain to have at least a 0.95 probability of replacing all failures on a given day? Assume continuous 24-hour use of the lights. 4. A 60-watt outdoor lightbulb is advertised as having an average life (i. e., MTTF) of 1000 (operating) hours. However, experience has shown that it will also fail on demand an average of once every 120 cycles. A particular bulb is turned on once each evening for an average of 10 hr. If it is desired to have a reliability of 90 percent, what is its design life in days?
Answers: 3
Mathematics, 21.06.2019 15:30
What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm
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Mathematics, 21.06.2019 18:10
Abc will undergo two transformations to give aa'b'c' which pair of transformations will give a different image of aabc if the order of the transformations is reversed? a. a rotation 90' counterclockwise about the origin followed by a reflection across the y-axis b a translation 5 units down followed by a translation 4 units to the right c. a reflection across the x-axis followed by a reflection across the y-axis a rotation 180'clockwise about the ongin followed by a reflection across the y-axis reset next 2 omentum all rights reserved o atk me anything o o e
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Mathematics, 21.06.2019 19:50
Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30
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Mathematics, 22.06.2019 02:20
The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?
Answers: 2
The time to failure of fluorescent lights in a large office building is exponentially distributed wi...
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