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3 years ago

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Mathematics

2 answers:

Mashcka [7]3 years ago

7 0

Answer:

6.1 ⋅ $10^{3}$

Step-by-step explanation:

i think smh

a_sh-v [17]3 years ago

7 0

Answer:

6100 because 3.05 times 10^7 is 30500000 and 5* 10 ^3 is 5000

30500000/5000 is 6100 or 6.1*10 ^3

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ou are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on cons

PolarNik [594]

Answer:

$(\frac{4\sigma}{2.056})^2$ , rounded up, if needed, citizens should be included in the sample, in which $\sigma$ is the standard deviation of the population.

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:

$\alpha = \frac{1 - 0.96}{2} = 0.02$

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

That is z with a pvalue of $1 - 0.02 = 0.98$ , so Z = 2.056.

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.

Within 4 years of the actual mean

We have to find n for which M = 4. So

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

$4 = 2.056\frac{\sigma}{\sqrt{n}}$

$2.056\sqrt{n} = 4\sigma$

$\sqrt{n} = \frac{4\sigma}{2.056}$

$(\sqrt{n})^2 = (\frac{4\sigma}{2.056})^2$

$n = (\frac{4\sigma}{2.056})^2$

$(\frac{4\sigma}{2.056})^2$ , rounded up, if needed, citizens should be included in the sample, in which $\sigma$ is the standard deviation of the population.

8 0

3 years ago

Find the measure of a supplement of a 20 3/4 degrees

ki77a [65]

$20 \frac{3}{4}= \frac{83}{4} \\ \\ 180^{(4}-\frac{83}{4}= \frac{720-83}{4}=\boxed{\frac{637}{4}=159 \frac{1}{4}-the \ suplement}$

4 0

3 years ago

Read 2 more answers

Please answer quickly :’)

Virty [35]

check below for labels,

Full line is referred as diameter.

Half of diameter or from centre touching the circle is called radius.

5 0

3 years ago

In each class what fraction of the cans were orange juice?

gayaneshka [121]

I should know this but I guess I don't, try going on x-actoschoolpro.com ;)

8 0

3 years ago

Need help pls

aalyn [17]

So, taking 149.98 and subtracting the non-taxable total, 26.95, you are left with 123.03, which to equal 10.07 would have to be multiplied by 0.0819, hence the sales tax is 0.0819.

6 0

3 years ago