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just olya [345]
2 years ago
8

IS THIS RIGHT???????????????????

Mathematics
2 answers:
soldier1979 [14.2K]2 years ago
6 0

Answer:

No, the correct answer is 20%

Step-by-step explanation:

2 from 10 total failures

2/10 = 0.2

(100)(0.2)=20%

Hope this helps.

Mnenie [13.5K]2 years ago
3 0

Answer:

yes it is correct 10% is the answer

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In addition to the facts in the diagram, which statement is necessary to prove that the two triangles are congruent by the SAS c
nasty-shy [4]
The best answer to go with is b
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Help pls im confused
pochemuha

it's the only one that hasn't been with a positive 2

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The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of m
UkoKoshka [18]

Answer:

Let X the random variable that represent the delivery times of a population, and for this case we know the distribution for X is given by:

X \sim N(14.7,3.7)  

Where \mu=14.7 and \sigma=3.7

Since the distribution of X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And we have;

\mu_{\bar X}= 14.70

\sigma_{\bar X} =\frac{3.7}{\sqrt{40}}= 0.59

Step-by-step explanation:

Assuming this question: The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of 14.7 minutes and a standard deviation of 3.7 minutes. Let R be the mean delivery time for a random sample of 40 orders at this restaurant. Calculate the mean and standard deviation of \bar X Round your answers to two decimal places.

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the delivery times of a population, and for this case we know the distribution for X is given by:

X \sim N(14.7,3.7)  

Where \mu=14.7 and \sigma=3.7

Since the distribution of X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And we have;

\mu_{\bar X}= 14.70

\sigma_{\bar X} =\frac{3.7}{\sqrt{40}}= 0.59

4 0
3 years ago
Please help!! Thanks
Troyanec [42]
X=3

X/-3 = -1 ,Leave X by itself so multiply by -3 on both sides.

X = -1*-3

X = 3, negative times negative equals positive.
6 0
3 years ago
Read 2 more answers
The center of a circle is at the origin. An endpoint of a diameter of the circle is at (-3, -4). How long is the diameter of the
Paladinen [302]

Answer:

25

Step-by-step explanation:

I believe

-3^2 + -4^2

9+16=25

7 0
3 years ago
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