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2 years ago

Help needed please extra points given

Mathematics

1 answer:

Allisa [31]2 years ago

4 0

y^2 . w

i think you could use this

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I need help with Geometry

Licemer1 [7]

ednocrkdlwmqcw e9rbeuopgjkmr qoejffwkf ,rwfrwfjr nmwrfHELP ME iuehf[eoiffkjkmfeiufkwjmfwufuStep-by-step explanation:

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2 years ago

The Wall Street Journal reported that automobile crashes cost the United States $162 billion annually (2008 data). The average c

ivanzaharov [21]

Answer:

$n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94$

So the answer for this case would be n=94 rounded up to the nearest integer

Step-by-step explanation:

Information given

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma= 500$ represent the population standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{s}{\sqrt{n}}$ (a)

And on this case we have that ME =120 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The confidence2 level is 98% or 0.98 then the significance level would be $\alpha=1-0.98=0.02$ and $\alpha/2=0.01$ , the critical value for this case would be $z_{\alpha/2}=2.326$ , replacing into formula (b) we got:

$n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94$

So the answer for this case would be n=94 rounded up to the nearest integer

8 0

2 years ago

Find the sum of the first n terms.

Sunny_sXe [5.5K]

S(8)=((100×(1−(50÷100)^(8))÷(1−50÷100)))
=199.22

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2 years ago

You bought a 5 pound turkey for $14.45. What is the cost for one pound?

sweet-ann [11.9K]

Answer:

$2.89

Step-by-step explanation:

$14.45/ 5= 2.89

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2 years ago

Sin-1 (2/3) rounded to nearest 10th

Luda [366]

the is answer 2 because if u round it 3

6 0

2 years ago