In circle C, mDE = 84°. Find each measure.1. measure of angle EFD

Mathematics

1 answer:

Paladinen [302]2 years ago

5 0

<h3>Answer: 42 degrees</h3>

Reason:

Use the inscribed angle theorem. Central angle DCE subtends the arc DE, so angle DCE = 84 degrees. Inscribed angle EFD is also subtending this same arc (DE), meaning we cut the arc/central angle measure in half to get 84/2 = 42.

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Read 2 more answers

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kherson [118]

Answer:

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And rounded up we have that n=1068

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

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$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Solution to the problem

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