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Phantasy [73]
3 years ago
15

a store received 12 boxes of doughnuts. Each box contained 12 doughnuts. Which expression represents how many doughnuts there ar

e in all?
Mathematics
1 answer:
Pachacha [2.7K]3 years ago
3 0

Answer:

12x12=144 doughnuts

Step-by-step explanation:

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Answer:

a) Figure attached

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An we know using the graph in part a that this area correspond to 0.95 or 95%

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Part a

For this case we can see the figure attached.

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

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And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

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And we can find this probability with this difference:

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Part c

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And we can find this probability with this difference:

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An we know using the graph in part a that this area correspond to 0.95 or 34+34+13.5+2.35%=83.85%

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