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2 years ago

20 POINTS

1 answer:

3 0

An isometric transformation is a transformation that preserves the distance and angles between a pre-image and its image. Examples are: translation, reflection, rotation.

Answer:

No, the side lengths are not preserved.

This is a non isometric transformation.

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The breaking strengths of cables produced by a certain manufacturer have a mean, u, of 1750 pounds, and a standard deviation of

AlladinOne [14]

Answer:

We accept the null hypothesis that the breaking strength mean is less and equal to 1750 pounds and has not increased.

Step-by-step explanation:

The null and alternative hypotheses are stated as

H0: u ≥ 1750 i.e the mean is less and equal to 1750

against the claim

Ha: u > 1750 ( one tailed test) the mean is greater than 1750

Sample mean = x`= 1754

Population mean = u = 1750

Population deviation= σ = 65 pounds

Sample size= n = 100

Applying the Z test

z= x`- u / σ/ √n

z= 1754- 1750 / 65/ √100

z= 4/6.5

z= 0.6154

The significance level alpha = 0.1

The z - value at 0.1 for one tailed test is ± 1.28

The critical value is z > z∝.

0.6154 is < 1.28

We accept the null hypothesis that the breaking strength mean is less and equal to 1750 pounds and has not increased.

8 0

3 years ago

10 x (150-3)=(10x150) ( _x3)

Vitek1552 [10]

I'm not sure if it's 10x or 10 times a number

5 0

3 years ago

Read 2 more answers

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. The mean is found to be 9.8

svetlana [45]

Answer:

The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 2.575\frac{2.4}{\sqrt{955}} = 0.2$

The lower end of the interval is the sample mean subtracted by M. So it is 9.8 - 0.2 = 9.6 reproductions per hour.

The upper end of the interval is the sample mean added to M. So it is 9.8 + 0.2 = 10 reproductions per hour.

The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.

8 0

2 years ago

What is the solution to the equation

timurjin [86]

the correct answer is y=2

4 0

3 years ago

Please answer this question

Ira Lisetskai [31]

Answer:

<h2>✏️ Answer</h2>

Step-by-step explanation:

<h3>#CarryOnLearning</h3><h3>#BrainlyPh</h3>

<h3>xXxNoyaxXx</h3>

3 0

2 years ago

Read 2 more answers