Mathematics, 24.05.2021 20:30, priscilaannmendez
The length of life of oil-drilling bits depends upon the types of rock and soil that the drill encounters, but it is estimated that the mean length of life is 55 hours. An oil exploration company purchases drill bits that have a length of life that is approximately normally distributed with mean equal to 55 hours and standard deviation equal to 9.1 hours. What proportion of the company’s drill bits will have to be replaced after more than 90 hours of use?
Answers: 2
Mathematics, 21.06.2019 17:30, SethSimunek
Choose the number sentence that shows the identity property of addition. a. 122 = 61 + 61 b. 62 = 1 + 61 c. 61 = 0 + 61
Answers: 1
Mathematics, 21.06.2019 22:30, rivera6681
Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.
Answers: 1
The length of life of oil-drilling bits depends upon the types of rock and soil that the drill encou...
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