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-BARSIC- [3]
3 years ago
12

The points A, B, C, and D are taken in order on the circumference of a circle. Chords AC and BD intersect at point E. mABarc = 7

6° and mCDarc = 80°. Draw chord AD. Find m∠AEB?
Mathematics
1 answer:
natka813 [3]3 years ago
7 0
Are you in ms.morales class right now
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An unconfined compression test was performed to determine the average strength of concrete cylinders (in psi). It is believed th
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Explained below.

Step-by-step explanation:

(1)

The confidence level is, 91%.

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\text{Confidence level}\% =(100-\alpha \%)\\\\91% = 100-\alpha \%\\\\\alpha \%=100-91\%\\\\\alpha \%=9\%\\\\\alpha =0.09

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(3)

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CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}

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(4)

The 91% confidence interval for population mean implies that there is a 0.91 probability that the true value of the mean is included in the interval, (2942.29, 3057.71) psi.

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