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3 years ago

SUBTRACT 39 FROM 16 RAISED TO THE 7TH POWER, THEN MULTIPLY BY 3

Mathematics

2 answers:

MA_775_DIABLO [31]3 years ago

7 0

I assume you mean 3(16^7-39)?

16^7 is 268435456

268435456-39 is 268435417

268435417 multiplied by 3 is 805306251

Hope this helped.

shusha [124]3 years ago

7 0

Answer: Call me (252) - 334 - 9945 or email me at [email protected]

Step-by-step explanation:

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A coin weighs about 14" pounds. Find the weight of 1000 of the coins. Round your answer to

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Answer:

I'm sorry I would help you I don't understand the second sentence.

Step-by-step explanation:

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3 years ago

Which box plot represents a set of data that has the least mean absolute deviation?

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Answer:

try the second one because it is the smallest and close togehet so maybe that means that the mean is closer to the number and it nots some outlier.

Step-by-step explanation:

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3 years ago

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6.Suppose the Gallup Organization wants to estimate the population proportion of those who think there should be a law that woul

drek231 [11]

Answer:

A sample of $n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$ is needed, in which E is the desired margin of error, as a proportion. If we find a decimal value, we round up to the next whole number.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

In a previous study of 1012 randomly chosen respondents, 374 said that there should be such a law.

This means that $n = 1012, \pi = \frac{374}{1012} = 0.3696$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

How large a sample size is needed to be 95% confident with a margin of error of E?

A sample size of n is needed, and n is found when M = E.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$E = 1.96\sqrt{\frac{0.3696*0.6304}{n}}$

$E\sqrt{n} = 1.96\sqrt{0.3696*0.6304}$

$\sqrt{n} = \frac{1.96\sqrt{0.3696*0.6304}}{E}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$

$n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$

A sample of $n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$ is needed, in which E is the desired margin of error, as a proportion. If we find a decimal value, we round up to the next whole number.

4 0

3 years ago

A field in the shape of a right triangle is bordered on one side by a stream, on another side by a road, and on a third side by

trasher [3.6K]

Answer:

42°

Step-by-step explanation:

For this problem, it may help you to draw it out to visualize it. You want to find the angle between the stream and road. Based on the description the triangle looks like this.

/ |

Stream(27) / | Road( 20)

/__|

Fence

You know the length of the road is 20, and the stream is 27. The angle can be found by using Cos∅=a/h. Adjacent to where the road and stream meet is the road, 20, and hypotenuse is the stream, 27.

So 20/27 = .74 = Cos∅

To find the angle ∅ use inverse cosine to get 42°.

Hope that helps and let me know if I did anything incorrectly!

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2 years ago

Thank you for helping

omeli [17]

Answer:

Step-by-step explanation:

the original ratio was 3/5 , so apply that to 20 and 3/5 of 20 is 12

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3 years ago

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