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Ray Of Light [21]
3 years ago
14

What is going on with Brainly rn mine is not working at all

Mathematics
1 answer:
Ratling [72]3 years ago
8 0

Answer:

I think it might be just u. U might want to check your wifi or your electronical device or try refreshing the page.

Step-by-step explanation:

mark as brainliest if u don't mind

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A battery has a lifetime that is approximately normally distributed with a mean of 600 hours and a standard deviation of 50 hour
miss Akunina [59]

Answer:

A. Your battery is likely defective since such poor performance is extremely unlikely.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

If X is more than two standard deviations from the mean, it is considered an unlikely outcome.

In this question, we have that:

\mu = 600, \sigma = 50

Which of the following conclusions is the most appropriate given this information?

Lasted 400 hours, so X = 400.

Z = \frac{X - \mu}{\sigma}

Z = \frac{400 - 600}{50}

Z = -4

4 standard deviations from the mean, so unlikely.

So the correct answer is:

A. Your battery is likely defective since such poor performance is extremely unlikely.

3 0
3 years ago
Minneapolis, Minnesota and Portland, Oregon have very similar latitudes. (Latitude measures how far north or south a place is, w
alexdok [17]

Answer:

B

Step-by-step explanation:

Khan

4 0
3 years ago
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Giving brainliest!???!!!!!
Jlenok [28]

Answer: B is the answer

4 0
3 years ago
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Antonio had his hair cut at the salon. After he returned home, he realized he had accidentally tipped the stylist 114% of the co
stepan [7]
=>C

1.14*20.95=23.883
5 0
3 years ago
A cube has a volume of 729 cubic inches. What is the length of each edge? Explain
Kipish [7]

Answer:

The\:length\:of\:each\:edge\:is\:9

Step-by-step explanation:

Volume\:of\:cube:V=a^{3} \:(a\:is\:the\:length\:of\:each\:edge)\\\Leftrightarrow a=\sqrt[3]{V} \Leftrightarrow a=\sqrt[3]{729} =9

7 0
3 years ago
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