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3 years ago

It’s all there in the picture will give brainlest to correct answer

Mathematics

1 answer:

SVEN [57.7K]3 years ago

3 0

Answer:

1. 10

2. 1 and 18

3. 17

4. 8

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"Reduce Fractions to lowest terms" 6 divided by 3.66

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Answer:

100/61 or 1.63934

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3 years ago

Does someone knows how to do this i need help ASAPPP!!!!

Ivahew [28]

Answer:

In point number 3 the angles shown are alternate angles and in point number 4 it is saying that the lines PQ and SR are equal. In point 5 it is saying that the two triangles SRT and QPT are equal because of A. A. S. axiom from statement 3 and 4.

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3 years ago

1. 0.0000000316 in scientific notation. 2. 0.000008304 in scientific notation.

prisoha [69]

Answer:

0.0000000316 = 3.16×10^-8

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3 years ago

4/7 = ________ (decimal-round to hundredths)

Kamila [148]

Answer: It is .571

Step-by-step explanation:

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3 years ago

Read 2 more answers

g A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estim

kipiarov [429]

Answer:

a) n= 1045 computers

b) n= 442 computers

c) A. Yes, using the additional survey information from part (b) dramatically reduces the sample size.

Step-by-step explanation:

Hello!

The variable of interest is

X: Number of computers that use the new operating system.

You need to find the best sample size to take so that the proportion of computers that use the new operating system can be estimated with a 99% CI and a margin of error no greater than 4%.

The confidence interval for the population proportion is:

p' ± $Z_{1-\alpha /2}$ * $\sqrt{\frac{p'(1-p')}{n} }$

$Z_{1-\alpha /2}= Z_{0.995}= 2.586$

a) In this item there is no known value for the sample proportion (p') when something like this happens, you have to assume the "worst-case scenario" that is, that the proportion of success and failure of the trial are the same, i.e. p'=q'=0.5

The margin of error of the interval is:

d= $Z_{1-\alpha /2}$ * $\sqrt{\frac{p'(1-p')}{n} }$

$\frac{d}{Z_{1-\alpha /2}} = \sqrt{\frac{p'(1-p)}{n} }$

$(\frac{d}{Z_{1-\alpha /2}})^2 = \frac{p'(1-p')}{n}$

$n * (\frac{d}{Z_{1-\alpha /2}})^2 = p'(1-p')$

$n= [p'(1-p')]*(\frac{Z_{1-\alpha /2}}{d} )^2$

$n=[0.5(1-0.5)]*(\frac{2.586}{0.04} )^2= 1044.9056$

n= 1045 computers

b) This time there is a known value for the sample proportion: p'= 0.88, using the same confidence level and required margin of error:

$n= [p'(1-p')]*(\frac{Z_{1-\alpha /2}}{d} )^2$

$n= [0.88*0.12]*(\frac{{2.586}}{0.04})^2= 441.3681$

n= 442 computers

c) The additional information in part b affected the required sample size, it was drastically decreased in comparison with the sample size calculated in a).

I hope it helps!

4 0

4 years ago