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Ronch [10]
3 years ago
7

Use the following figure to answer the question. 1 and 8 are ____ angles.

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
7 0

<1 and <8 are alternate exterior angles

Hope it helps

zalisa [80]3 years ago
6 0

Answer:

The correct option is A) alternate exterior angles.

Step-by-step explanation:

Consider the provided figure.

Two lines are cut by a transversal, the pairs of angles on either side of the transversal and outside the two lines are called the alternate exterior angles.

In the above figure, the alternate exterior angles are:

∠1 and ∠8

∠2 and ∠7

Hence,  ∠1 and ∠8 are alternate exterior angles.

Therefore, the correct option is A) alternate exterior angles.

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A geologist examines 6 seawater samples for lead concentration. The mean lead concentration for the sample data is 0.903 cc/cubi
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Answer:

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean lead concentration of sea water samples

Number of samples. n = 6

Mean, u = 0.903 cc/cubic meter

Standard deviation, s = 0.0566

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

0.903 +/- 1.96 × 0.0566/√6

= 0.903 +/- 1.96 × 0.0566/2.44948974278

= 0.903 +/- 0.045

The lower end of the confidence interval is 0.903 - 0.045 =0.858

The upper end of the confidence interval is 0.903 + 0.045 =0.948

Therefore, with 95% confidence interval, the mean lead concentration of the sea water is between 0.858 cc/cubic meter and 0.948 cc/cubic meter

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