![subject](/tpl/images/cats/mat.png)
Mathematics, 15.04.2020 17:25 dinadenoirefan
Suppose the life of a particular brand of calculator battery is approximately normally distributed with a mean of 75 hours and a standard deviation of 10 hours. What is the probability that a single battery randomly selected from the population will have a life?
a) no more than 72 hours
b) at least 77 hours
*what is the probability that 16 randomly sampled batteries from the population will have a sample mean life between 70 and 80 hours?
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/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
Svetlana's hair is 4 4 centimeters ( cm cm) long. her hair grows 1 . 5 cm 1.5cm per month. svetlana wants her hair to be less than 1 6 cm 16cm long. write an inequality to determine the number of months, m m, svetlana can allow her hair to grow so that it is less than 1 6 cm 16cm long.
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 18:10
What is the equation in slope-intercept form of the linear function represented by the table? y -18 -1 -8 4 2 912 o y=-2x-6 o y=-2x+6 o y=2x-6 o y = 2x+6
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:30
Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 20:00
Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance
Answers: 1
You know the right answer?
Suppose the life of a particular brand of calculator battery is approximately normally distributed w...
Questions
![question](/tpl/images/cats/en.png)
English, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
Mathematics, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
Mathematics, 08.07.2019 13:10
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
English, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
Mathematics, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
Mathematics, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mir.png)
World Languages, 08.07.2019 13:10
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
Mathematics, 08.07.2019 13:10
![question](/tpl/images/cats/mat.png)
Mathematics, 08.07.2019 13:10
![question](/tpl/images/cats/ekonomika.png)