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 12:30
What is the percent of increase for a population that changed from 438,000 to 561,000
Answers: 1
Mathematics, 21.06.2019 15:20
Beth took out a $20,000 loan for college she is borrowing money from two banks. bank a charges an interest rate of 8.5% bank b charges and interest rate of 10.5% after one year alice owes $1860 in interest how much money did she borrow from bank a
Answers: 3
Mathematics, 21.06.2019 16:50
An angle that measures between 90 and 180° is called a(,
Answers: 2
The length of life of oil-drilling bits depends upon the types of rock and soil that the drill encou...
Chemistry, 23.08.2019 06:00
History, 23.08.2019 06:00
Mathematics, 23.08.2019 06:00
Mathematics, 23.08.2019 06:00
Mathematics, 23.08.2019 06:00
Mathematics, 23.08.2019 06:00
Spanish, 23.08.2019 06:00
Chemistry, 23.08.2019 06:00
Mathematics, 23.08.2019 06:00
Chemistry, 23.08.2019 06:00
Mathematics, 23.08.2019 06:00
English, 23.08.2019 06:00
Geography, 23.08.2019 06:00