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yesseniaroman21
21.07.2019 •
Mathematics
Acity stores fresh water in a spherical tank the tank has a radius if 32 feet if the city drains 140000 gallons of water out of the full tank how many gallons are left in the tank?
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Ответ:
Ответ:
34%
Step-by-step explanation:
According to the Empirical rule,
About 68% of the population lies with in one standard deviation from the mean.
i.e. About 34% of the population lies above one standard deviation from the mean .
and About 34% of the population lies below one standard deviation from the mean.
Given : The distribution of the number of daily requests is bell-shaped ( i.e. Normally distribution) and has a mean of 60 and a standard deviation of 11.
i.e.![\mu=60\ \ \sigma=11](/tpl/images/0372/9748/206ba.png)
Using the Empirical Rule rule, 34% of the population of lightbulb replacement requests lies above one standard deviation from the mean .
i.e. About 34% of the population of lightbulb replacement requests lies between
and ![\mu+\sigma](/tpl/images/0372/9748/96611.png)
i.e. About 34% of the population of lightbulb replacement requests lies between
and ![60+11](/tpl/images/0372/9748/4d197.png)
i.e. About 34% of the population of lightbulb replacement requests lies between 60 and 71
Hence, the approximate percentage of lightbulb replacement requests numbering between 60 and 71 = 34%