Number 3 explanation to why the answer is c

Mathematics

1 answer:

Semmy [17]3 years ago

7 0

Number of cars washed by the eight teams per hour = 2 * 8 = 16 cars.
Number of cars washed by the eight teams in 5 = 16 * 5 = 80 cars.

The teams should charge $600/80 = $7.50

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sdas [7]

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3 years ago

a variable x has a normal distribution with mean 54 and standard deviation 5. approximately what percentage of the observations

yuradex [85]

For a normal distribution with mean 54 and standard deviation 5 95.4% of them fall between 44 and 64

The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

$z=\frac{x-\mu}{\sigma} \\\\where\ \mu=mean.\sigma=standard\ deviation, x=raw\ score\\\\Given\ that\ mean(\mu)=54,standard \ deviation (\sigma)=5\\\\For\ x=44:\\\\z=\frac{44-54}{5}=-2\\\\For\ x=64:\\\\z=\frac{64-54}{5}=2$