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DIA [1.3K]
3 years ago
5

En una casa, un pasillo mide 6 m, y en su plano, 2,4 cm. Halla la escala

Mathematics
1 answer:
PolarNik [594]3 years ago
7 0

Answer:i dont speak spanish so im so sorry

Step-by-step explanation:

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Keegan and Annie are working on an experiment in the science lab. Their mixture contains ingredients that weigh 5.22 grams, 5.7
Elza [17]

Answer:

C

Step-by-step explanation:

5 0
3 years ago
Please help!! whoever gets right i’ll mark brainlist
storchak [24]

Answer:

It's B

Step-by-step explanation:

Because 10 less than 20 mean 20 is not greater so B. ) is correct

3 0
3 years ago
Complete the comparison: 26 < ? A. 25 B. 54 C. 13 D. 26
Nookie1986 [14]
The answer for that one is B, because 26<54
meaning 26 is less than 54 which is true 
6 0
3 years ago
Read 2 more answers
f the dean wanted to estimate the proportion of all students receiving financial aid to within 3% with 99% reliability, how many
Oksanka [162]

Answer:

n=1849

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 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{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

Assuming that the proportion is estimated \hat p =0.5. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.03}{2.58})^2}=1849  

And rounded up we have that n=1849

7 0
3 years ago
Which expression means the same as the phrase below?
dimulka [17.4K]
B - (5 x 8) - 3

A is adding 3, not subtracting.
C is basically 5 squared.
D is 5 lots of 11.
5 0
2 years ago
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