Mathematics, 19.05.2021 20:20, ebookhardt917
The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 1500 hours and a standard deviation of 90 hours. Out of 165 freshly installed light bulbs in a new large building, how many would be expected to last more than 1640 hours, to the nearest whole number?
Answers: 1
Mathematics, 21.06.2019 16:00, hateschool5207
Identify a1 and r for the geometric sequence an= -256(-1/4) n-1
Answers: 3
Mathematics, 21.06.2019 17:30, Vampfox
Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?
Answers: 1
Mathematics, 21.06.2019 21:40, melinalange48
What is the value of x in the equation 1.5x+4-3=4.5(x-2)?
Answers: 2
The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 1500 ho...
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