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kakasveta [241]
3 years ago
10

What is the simplest form of 2 square root of 2 over square root of 3 minus square root of 2

Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
7 0
The answer would be A or 2 square root of 6 + 4!! Hope that helped please give me 5 stars and a thanks! Thanks so much ! Do well on your test!
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Which of the following does NOT describe a rational number? A- Non-repeating decimal B- Perfect square (ex: square root of 4) C-
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Answer:

Non-repeating decimal

Step-by-step explanation:

As a example, 32.93729, would be a never ending number. Which means it's not a rational number, it is a irrational number.

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A geologist examines 14 geological samples for iron concentration. The mean iron concentration for the sample data is 0.181 cc/c
kykrilka [37]

Answer:

The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.

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{1-0.9}{2} = 0.05

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 1-0.05 = 0.95, so z = 1.645

Now, find 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.

M = 1.645*\frac{0.0318}{\sqrt{14}} = 0.0140

The lower end of the interval is the sample mean subtracted by M. So it is 0.181 - 0.0140 = 0.167 cc/m³.

The upper end of the interval is the sample mean added to M. So it is 0.181 + 0.0140 = 0.195 cc/m³.

The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.

3 0
3 years ago
Please help meeeeeee​
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Answer:

(x, y) ⇒ (½x, ½y)

(x, y) ⇒ (x + 7, y + 7)

Step-by-step explanation:

each x value of P'Q'R' is half of the x value for PQR

each y value of P'Q'R' is half of the y value for PQR

each x value of P"Q"R" is seven units to the right of the x value for P'Q'R'

each y value of P"Q"R" is seven units above the y value for P'Q'R'

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