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3 years ago

Please help me quick ASAP!!!!!!!!!! Help me ith all the questions 1-5 PLEASE!!!!!!

Mathematics

2 answers:

elixir [45]3 years ago

6 0

C) Length of 7 and Width of 4. This is because 14 x 2 is 28, and 7 x 4 is 28 as well.

I hope this Helps!

Ugo [173]3 years ago

5 0

1. C because when multiplied they equal 28
2. D because rectangle z 4+4+9+9 = 26
3. D they have the same perimeter but 9x2 doesn't equal 7x4
4. B because 7x7 is 49 and its greater than all the others
5. B because 7x6 doesnt equal 30 but 7+7+6+6= 26

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The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p

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Answer:

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Step-by-step explanation:

We are given the following in the question:

Sample size, n = 67

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We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

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$\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}$

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Step-by-step explanation:

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