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77julia77 [94]
4 years ago
14

Which dimensions cannot create a triangle? three angles measuring 25°, 65°, and 90° three angles measuring 50°, 50°, and 50° thr

ee sides measuring 5 in., 12 in., and 13 in. three sides measuring 4 ft, 8 ft, and 14 ft
Mathematics
2 answers:
meriva4 years ago
8 0

three angles measuring 50°, 50°, 50° because they would add up to 150°. a triangles angles can only add up to 180°

Elodia [21]4 years ago
4 0

Three angles measuring 50 cannot create a triangle. A triangle's angles add up to 180. 50 + 50 + 50 = 150

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Answer:

The 99% confidence interval is (0.0787, 0.1613).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

Z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

The survey included 411 adults between the ages of 55 and 64, and 50 of them said that they had used online dating. This means that n = 411, \pi = \frac{50}{411} = 0.12

The 99% confidence interval is

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 - 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.0787

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 + 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.1613

The 99% confidence interval is (0.0787, 0.1613).

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Answer:

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Step-by-step explanation:

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