![subject](/tpl/images/cats/mat.png)
Mathematics, 05.02.2021 21:10 wolfsaway
An article in Fire Technology, 2014 (50.3) studied the effectiveness of sprinklers in firecontrol by the number of sprinklers that activate correctly. The researchers estimate the probability of a sprinkler to activate correctly to be 0.7. Suppose that you are an inspector hired to write a safety report for a large ballroom with 10 sprinklers. Assume the sprinklers activate correctly or not independently.
(a) What is the probability that all of the sprinklers will operate correctly in a fire? Round your answer to three decimal places (e. g. 98.765)
(b) What is the probability that at least 7 of the sprinklers will operate correctly in a fire? Round your answer to two decimal places (e. g. 98.76),
(c) What is the minimum number of sprinklers needed so that the probability that at least one operates correctly is at least 0.98?
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 16:00
Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:50
If the scale factor between two circles is 2x/5y what is the ratio of their areas?
Answers: 3
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 20:30
Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.
Answers: 3
You know the right answer?
An article in Fire Technology, 2014 (50.3) studied the effectiveness of sprinklers in firecontrol by...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 04.03.2021 01:00
![question](/tpl/images/cats/mat.png)
Mathematics, 04.03.2021 01:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 04.03.2021 01:00
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 04.03.2021 01:00
![question](/tpl/images/cats/mat.png)
Mathematics, 04.03.2021 01:00
![question](/tpl/images/cats/istoriya.png)
History, 04.03.2021 01:00
![question](/tpl/images/cats/geografiya.png)
Geography, 04.03.2021 01:00
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 04.03.2021 01:00
![question](/tpl/images/cats/biologiya.png)
Biology, 04.03.2021 01:00
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 04.03.2021 01:00