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3 years ago

What is the exterior angle of 30°

Mathematics

2 answers:

Artist 52 [7]3 years ago

6 0

The exterior angle would be 150 degrees (180-30).

aleksandrvk [35]3 years ago

5 0

Answer:

tyj6rtyejuku

Step-by-step explanation:

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The amount of lateral expansion (mils) was determined for a sample of n = 8 pulsed-power gas metal arc welds used in LNG ship co

Alona [7]

Answer:

95% Confidence interval for the variance:

$3.6511\leq \sigma^2\leq 34.5972$

95% Confidence interval for the standard deviation:

$1.9108\leq \sigma \leq 5.8819$

Step-by-step explanation:

We have to calculate a 95% confidence interval for the standard deviation σ and the variance σ².

The sample, of size n=8, has a standard deviation of s=2.89 miles.

Then, the variance of the sample is

$s^2=2.89^2=8.3521$

The confidence interval for the variance is:

$\dfrac{ (n - 1) s^2}{ \chi_{\alpha/2}^2} \leq \sigma^2 \leq \dfrac{ (n - 1) s^2}{\chi_{1-\alpha/2}^2}$

The critical values for the Chi-square distribution for a 95% confidence (α=0.05) interval are:

$\chi_{0.025}=1.6899\\\\\chi_{0.975}=16.0128$

Then, the confidence interval can be calculated as:

$\dfrac{ (8 - 1) 8.3521}{ 16.0128} \leq \sigma^2 \leq \dfrac{ (8 - 1) 8.3521}{1.6899}\\\\\\3.6511\leq \sigma^2\leq 34.5972$

If we calculate the square root for each bound we will have the confidence interval for the standard deviation:

$\sqrt{3.6511}\leq \sigma\leq \sqrt{34.5972}\\\\\\1.9108\leq \sigma \leq 5.8819$

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3 years ago

* There are 17 members in a travel group. The Venn diagram below shows members that have been to the United

Nastasia [14]

Answer:

7 has been to Australia

9 has not been to the united states

10 has not been to Australia

8 has been to the United States

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3 years ago

1/3 divided by 4 is? (In its simplest form and in a fraction) 13 points!

galben [10]

Answer:

1/12

Step-by-step explanation:

Given the following mathematical expression;

$\frac{\frac{1}{3}}{4}$

We would apply the law of indices for fractions.

1/3/(4) = 1/3 * 1/4 = 1/12

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3 years ago

Hi i need to identify the congruence postulation i think i need help.

ozzi

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3 years ago

Choose which group of sets the following number belongs to. Be sure to account for ALL sets. 6/7

diamong [38]

Answer:

natural number belongs to set N

integer belongs to set Z

rational number belongs to set Q

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3 years ago