Mathematics, 17.12.2019 04:31 henryzx900
Light bulbs used for the exterior walkways of a college campus have an average lifetime of 500 hours. assume that the lifetime of bulbs is normally distributed with standard deviation 50 hours. suppose all of the bulbs were replaced at the same time and they have been turned on for a total of 550 hours. what is the probability that a randomly chosen light bulb lasts less than 550 hours?
Answers: 3
Mathematics, 21.06.2019 18:30, anabellabenzaquen
The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.
Answers: 3
Mathematics, 21.06.2019 21:20, KennyMckormic
The radius of the circle below intersects the unit circle at (3/5,4/5). what is the approximate value of theta? 0.6 radians 1.0 radians 36.9 degrees 53.1 degrees
Answers: 3
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