Mathematics, 13.03.2020 02:33 markitakimbrough69
An oil exploration company purchases drill bits that have a life span that is approximately normally distributed with a mean equal to 74 hours and a standard deviation equal to 12 hours. (Round your answers to four decimal places.) (a) What proportion of the company's drill bits will fail before 65 hours of use? (b) What proportion will last at least 65 hours? (c) What proportion will have to be replaced after more than 83 hours of use?
Answers: 1
Mathematics, 21.06.2019 18:30
Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared
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Mathematics, 21.06.2019 18:40
The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?
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An oil exploration company purchases drill bits that have a life span that is approximately normally...
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