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3 years ago

6

nadia started at 19.26 feet below sea level & then changed her altitude by climbing a total of 5,437.8 feet up from her init

ial position. what was nadias altitude at the end of her climb?

2 answers:

shusha [124]3 years ago

8 0

The answer would be 5418.54 feet above sea level.

andre [41]3 years ago

3 0

5437.8-19.26 = 5418.54 feet above sea level

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The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

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3 years ago

Suppose a white dwarf star has a diameter of approximately 1.8083 to the power of 4 km. Use the formula 4n to the power of 2 to

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ANSWER:

The surface area of the star is 3.2700 x $10^{8}$ square kilometres.

EXPLANATIONS:

Diameter of the star = 1.8083 x $10^{4}$ Km.

Surface area of the star = 4 $n^{2}$

Where n is the radius of the star.

So that;

n = $\frac{ 1.8083 * 10^{4} }{2}$

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Thus,

Surface area = 4 x $(0.90415*10^{4} )^{2}$

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Step-by-step explanation:

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2 years ago

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Alla [95]

Answer:

B. $75 + 0.55m$

Step-by-step explanation:

We know that the constant is $75. You only pay this once.

Whereas $0.55 you pay per mile. Which means that you will multiply 0.55 by how many miles you drive.

This means that the equation will look like:

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Hope this helps! :)

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3 years ago

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Bad White [126]

Answer:

a) y = 2x +4

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Step-by-step explanation:

The given equations are in slope-intercept for, so we can read the slope directly from the equation. It is the x-coefficient.

We can then write an equation of a parallel line using the point-slope form of the equation of a line:

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If you like, you can rearrange this to "slope-intercept" form. Add k and simplify.

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b) m = 1/2, (h, k) = (0, 4)

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y = 1/2x +4

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y = -2x +(3 -(-2)(4))

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3 years ago