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3 years ago

If a negative 10 became a positive 10 how many 100 centimeters are there in 4,057 squared feet?

Mathematics

2 answers:

astra-53 [7]3 years ago

6 0

200 c squared feet in all

likoan [24]3 years ago

4 0

200 c Square feet in all

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4 years ago

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In a manufacturing process, we are interested in measuring the average length of a certain type of bolt. Past data indicate that

Goryan [66]

Answer:

We need a sample size of 600 or higher in order to make us 95 percent confident that the sample mean bolt length is within .02 inches of the true mean bolt length

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:

$\alpha = \frac{1-0.95}{2} = 0.025$

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 $1-0.025 = 0.975$ , so $z = 1.96$

Now, we 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.

How many bolts should be sampled in order to make us 95 percent confident that the sample mean bolt length is within .02 inches of the true mean bolt length?

We need a sample size of n or higher, when $M = 0.02, \sigma = 0.25$ . So

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

$0.02 = 1.96*\frac{0.25}{\sqrt{n}}$

$0.02\sqrt{n} = 0.49$

$\sqrt{n} = \frac{0.49}{0.02}$

$\sqrt{n} = 24.5$

$\sqrt{n}^{2} = (24.5)^{2}$

$n = 600$

We need a sample size of 600 or higher in order to make us 95 percent confident that the sample mean bolt length is within .02 inches of the true mean bolt length

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3 years ago

What is 3.248 repeating as a fraction

AysviL [449]

Answer:

Example 1: 3.248 repeating line over 8

Example 2: 3.248 repeating line over 48

Example 3: 3.248 repeating line over 248

Step-by-step explanation:

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4 years ago

If a negative 10 became a positive 10 how many 100 centimeters are there in 4,057 squared feet?​

If a negative 10 became a positive 10 how many 100 centimeters are there in 4,057 squared feet?