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Nezavi [6.7K]
2 years ago
14

Please help fast need a 100

Mathematics
1 answer:
Artist 52 [7]2 years ago
5 0

Answer:i think its 60,2

Step-by-step explanation:

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Rewrite as a positive exponent 5 – 2
Vadim26 [7]
To express
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x
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5
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2
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5 0
3 years ago
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
Round to the nearst hundredh 58.635
Aleonysh [2.5K]
58.635 rounded to the nearest hundreth is:

58.6 because 3 is less than 5

Hope I Helped You!!!
5 0
3 years ago
A fireworks store is offering 15% off all fireworks. If you come to the store on the fourth of July, you get an extra 15% off th
MrRa [10]
15% off all fireworks
extra 15% off on July Fourth.

$112.25*.15= 16.8375
112.25-16.8375= 95.1625 *.15= 14.274375
95.1625-14.274375= 80.888125

$80.89 is the price.
3 0
3 years ago
A negative number divided by a positive number have to equal 7
Andrei [34K]

Answer:

-49 divided by 7

Step-by-step explanation:

-49 ÷ 7

= <u>-</u><u>7</u>

3 0
2 years ago
Read 2 more answers
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