subject
Mathematics, 29.06.2019 15:10 ummsumaiyah4185

Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.3 hours. with this information, answer the following questions. (a) what proportion of light bulbs will last more than 61 hours? (b) what proportion of light bulbs will last 53 hours or less? (c) what proportion of light bulbs will last between 57 and 62 hours? (d) what is the probability that a randomly selected light bulb lasts less than 46 hours?

ansver
Answers: 1

Another question on Mathematics

question
Mathematics, 21.06.2019 15:00
Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar
Answers: 3
question
Mathematics, 21.06.2019 17:00
The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a ā€œstandardā€ earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.
Answers: 1
question
Mathematics, 21.06.2019 19:00
For what value of (y) is 3^3/3^y =1/9
Answers: 1
question
Mathematics, 21.06.2019 21:10
What is the domain of the given function? {(3,-2), (6, 1), (-1, 4), (5,9), (-4, 0); o {x | x= -4,-1, 3, 5, 6} o {yl y = -2,0, 1,4,9} o {x|x = -4,-2, -1,0, 1, 3, 4, 5, 6, 9} o y y = 4,-2, -1, 0, 1, 3, 4, 5, 6, 9}
Answers: 1
You know the right answer?
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56...
Questions
question
Mathematics, 25.02.2020 02:54