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klasskru [66]
3 years ago
15

Giving brainlist to whoever answers

Mathematics
1 answer:
mestny [16]3 years ago
8 0

Answer:

85.33ft2

Step-by-step explanation:

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Olenka [21]
1/5  this is the closest answer i can think of

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3 years ago
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A particular battery claims to have a mean life of 400 hours with a standard deviation of 30 hours. Approximately what percent o
Svetach [21]

Using the normal distribution, it is found that 25.14% of the batteries will last more than 420 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

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

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

In this problem, we have that the mean and the standard deviation are given, respectively, by:

\mu = 400, \sigma = 30.

The proportion of the batteries will last more than 420 hours is <u>one subtracted by the p-value of Z when X = 420</u>, hence:

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

Z = \frac{420 - 400}{30}

Z = 0.67

Z = 0.67 has a p-value of 0.7486.

1 - 0.7486 = 0.2514.

0.2514 = 25.14% of the batteries will last more than 420 hours.

More can be learned about the normal distribution at brainly.com/question/24663213

#SPJ1

3 0
2 years ago
Please look at pic below. Will give 100 points!!!!! NUMBER 2 I NEED HELP
natta225 [31]

Answer:

#2

It is assumed the base of the prism is a square wit side of 5 cm.

<u>The volume is:</u>

  • V = Bh = 250 cm³

<u>The base is:</u>

  • B = a² = 5² = 25 cm²

<u>Find h:</u>

  • h = V/B
  • h = 250/25 = 10cm
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3 years ago
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Which multiplication expression is equivalent to<br>6+ (6) + 16)​
IrinaK [193]

Answer:

isn't it 28

Step-by-step explanation:

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Last question for the day :)
Marat540 [252]

Answer:

26 cm

Step-by-step explanation:

Please give me brainliest ;)

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