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Katen [24]
3 years ago
10

(ApexVS) If two line segments have the same length, which of the following must be true?

Mathematics
2 answers:
Leokris [45]3 years ago
6 0

The Answer to this question is D- They are Congruent

gtnhenbr [62]3 years ago
3 0

Answer:

Option D and Option C are correct.

Step-by-step explanation:

Given if two line segments have the same length then we have to choose the correct option.

Option A. They share an endpoint.

Two line segments with same length not results the end points are same as shown in attachment. They does not share an end point still are of same length.

Option B. They form a right angle.

Two line segments with same length not results the end points are same as shown in attachment i.e not necessary these two are joined or formed an angle.

Option C. They are equal

Line segments are congruent if they have the same length.

Congruent means equal.

Option D. They are congruent.

Line segments are congruent if they have the same length.

hence, the two lines are congruent.

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2 years ago
A manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly.
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Answer:

We conclude that the population mean light bulb life is at least 500 hours at the significance level of 0.01.

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We are given that a manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly. The population standard deviation is 50 hours and the light bulb life is normally distributed.

You select a sample of 100 light bulbs and find mean bulb life is 490 hours.

Let \mu = <u><em>population mean light bulb life.</em></u>

So, Null Hypothesis, H_0 : \mu \geq 500 hours      {means that the population mean light bulb life is at least 500 hours}

Alternate Hypothesis, H_A : \mu < 500 hours     {means that the population mean light bulb life is below 500 hours}

The test statistics that would be used here <u>One-sample z test statistics</u> as we know about the population standard deviation;

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Since our test statistic is higher than the critical value of z as -2 > -2.33, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <u>we fail to reject our null hypothesis.</u>

Therefore, we conclude that the population mean light bulb life is at least 500 hours.

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