Mathematics, 13.11.2019 17:31 guazet7650

The lighting department of a city has installed 2000 electric lamps with an average life of 1000 hrs and a standard deviation of 200 hrs. (10 points) a. after what period of lighting hours would we expect 10% of the lamps to fail? b. how many lamps may be expected to fail between 900 and 1300 hrs?

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 19:00, doodles51

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4

Answers: 2

continue

Mathematics, 21.06.2019 21:00, GreenHerbz206

Solving algebraic equations 2m+3=11

Answers: 2

continue

Mathematics, 21.06.2019 21:30, kingdrew27

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?

Answers: 2

continue

Mathematics, 21.06.2019 22:30, drandbone92

What is fraction that is equivalent to 3/8

Answers: 2

continue

You know the right answer?

The lighting department of a city has installed 2000 electric lamps with an average life of 1000 hrs...

Questions in other subjects:

Mathematics, 24.06.2019 02:00

What is 89 devided by 7 + 46 to the second power...

English, 24.06.2019 02:00

Read the text and study the pie chart. fellow students, during my campaign for student council president, i promised to make student council activities more transparent to members...

English, 24.06.2019 02:00

Read the text and review the chart. the standard plank test is an easy way to measure the strength and endurance of your core muscles. you can perform the test at home. all you nee...

History, 24.06.2019 02:00

After wold war 3 why did the user want to control countries in eastern europe...

Mathematics, 24.06.2019 02:00

Paul had 75 fliers to post around town. last week, he posted 2/5 of them. this week, he posted 1/5 of the remaining fliers. how many fliers has he still not posted?...

English, 24.06.2019 02:00

Read the excerpt from the call of the wild. when buck earned sixteen hundred dollars in five minutes for john thornton, he made it possible for his master to pay off certain debts...

History, 24.06.2019 02:00

Robert owen began a community based on his ideas of . in a utopian society, all members of the community would be cared for. in owen’s utopian model at new lanark, people received...

Mathematics, 24.06.2019 02:00

Find the equation of a parabola that has a vertex of (3,-1)and has a y intercept of(0,-8)...

Mathematics, 24.06.2019 02:00

Tyler swims at constant speed, 5 meters every 4 seconds. how long it take him to swim 114 meters?...

Health, 24.06.2019 02:00

Where would the following activity best fit on the physical activity pyramid? yoga...

More questions: Mathematics Another questions