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Hitman42 [59]
3 years ago
8

Free points: this is because of all the kindness I have seen on brainly:

Mathematics
2 answers:
Y_Kistochka [10]3 years ago
6 0

The answer to 5x5 is 25

Westkost [7]3 years ago
5 0

Answer:

5x5=25

Step-by-step explanation:

hope it's helpful

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Which number produces an irrational number when multiplied by 0.4?
andriy [413]
5 x 0.4 = 2 and \sqrt{2} = 1.4142....... which is an irrational number

3 0
3 years ago
Ation in an Application Problem
Greeley [361]
Less than $3 because 25/7/2
6 0
2 years ago
An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equ
kompoz [17]

Answer:

0.62% probability that a random sample of 16 bulbs will have an average life of less than 775 hours.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}

Normal probability distribution.

Problems of normally distributed samples can be solved using 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.

In this problem, we have that:

\mu = 800, \sigma = 40, n = 16, s = \frac{40}{\sqrt{16}} = 10

Find the probability that a random sample of 16 bulbs will have an average life of less than 775 hours.

This probability is the pvalue of Z when X = 775. So

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

Z = \frac{775 - 800}{10}

Z = -2.5

Z = -2.5 has a pvalue of 0.0062. So there is a 0.62% probability that a random sample of 16 bulbs will have an average life of less than 775 hours.

5 0
3 years ago
On the coordinate plane below, triangle ABC was rotated
agasfer [191]

Answer: AB/y = BC/z = AC/x

Step-by-step explanation:

Side AB corresponds to side y, side BC corresponds to side z, and side AC corresponds to side x.

7 0
2 years ago
0.0023 + 65
stepladder [879]
65 would be your answer.
5 0
1 year ago
Read 2 more answers
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