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Zarrin [17]
2 years ago
5

Please help me with this question please

Mathematics
2 answers:
nadya68 [22]2 years ago
7 0

Answer:

15

Step-by-step explanation:

The ratio of (the foot of the ladder to the person) : (the person's height) is equal to (the wall to the foot of the ladder) : (the height of the wall) because the triangles are similar. So, if you solve the problem you will get:

(x= the height of the wall)

6:6 = 6+9:x

6:6 = 15:x

1:1=15:x

x=15

The height of the wall is 15 feet.

Sergio039 [100]2 years ago
3 0

Answer:

Step-by-step explanation:

Hi

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The number of years of education of self-employed individuals in the united states has a population mean of 13.6 years and a pop
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Answer:

0.3 years

Step-by-step explanation:

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μ = 13.6

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So now we have some notation, where μ represents population mean and σ represents population standard deviation. Hopefully, you already know that the sample mean of x-bar is the same as the population mean, so x-bar = 13.6. Now, the question asks us what the standard deviation is. Since the sample here is random, we can use the Central Limit Theorem, which allows us to guess that a distribution will be approximately normal for large sample sizes (that is, n ≥ 30). In this case, our sample size is 100, so that is satisfied. We're also told our sample is random, so we're good there, too. Now all we have to do is plug some stuff in.

The Central Limit Theorem says that for large values of n, x-bar follows an approximately normal distribution with sample mean = μ and sample standard deviation = σ/√n. So, with that info, all we need to do to find the standard deviation of x-bar is to plug our σ and n into the above formula.

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So your answer here is .3 years.

7 0
3 years ago
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