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2 years ago

Please help me!!!!!!!!!!

Mathematics

1 answer:

bezimeni [28]2 years ago

4 0

9.2 x 13.8 = 126.96, now usually to get the area of a triangle we would half this but because we have two of the same triangle we would then have to double it again so they cancel each other out. We then do 6.9 x 9.2 which equals 63.48 and again we have two of the same triangle so no need to half it. So we add the two totals of 126.96 and 63.48 together to get 190.44.

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Answer:

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So the answer for this case would be n=16 rounded up to the nearest integer

Step-by-step explanation:

For this case we have the following info given:

$\sigma = 2.2$ represent the population deviation

$Confidence =0.8$

$ME = 0.3$ represent the margin of error desired

The margin of error for the true mean is given by this formula:

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And on this case we have that ME =0.03 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 confidence level is 80%, the significance would be $\alpha=0.2$ and $\alpha/2 =0.1$ the critical value for this case is $z_{\alpha/2}=0.539$ , replacing into formula (b) we got:

$n=(\frac{0.539(2.2)}{0.3})^2 =15.62 \approx 16$

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2 years ago

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Step-by-step explanation:

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Answer:

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Explanation:

Note: This question can be solved without the need of the tables

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This means that, this point should belong to all the equations in the system

Now, a table is used to show a set of points that belong to a certain line

This means that, all vales in the table belong to the line they represent

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Hope this helps :)

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2 years ago