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swat32
3 years ago
7

Which is used by scientists as evidence that earths inner core is solid?

Mathematics
2 answers:
Romashka [77]3 years ago
7 0
What are the answer choices???
Degger [83]3 years ago
6 0

Answer:

Seismological waves

Step-by-step explanation:

Due to its impossible accessibility, the pieces of evidence came through earthquakes seismological waves. And these waves, are compiled by seismological stations around the globe, that capture earthquakes, and other seismic waves and classify them. And the conclusion is the outer core is liquid, but the inner core is solid.

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The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees. If we want to be 90% c
siniylev [52]

Answer:

19 beers must be sampled.

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 Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.645.

Now, find the margin of error 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.

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees.

This means that \sigma = 0.26

If we want to be 90% confident that the sample mean beer temperature is within 0.1 degrees of the true mean temperature, how many beers must we sample?

This is n for which M = 0.1. So

M = z\frac{\sigma}{\sqrt{n}}

0.1 = 1.645\frac{0.26}{\sqrt{n}}

0.1\sqrt{n} = 1.645*0.26

\sqrt{n} = \frac{1.645*0.26}{0.1}

(\sqrt{n})^2 = (\frac{1.645*0.26}{0.1})^2

n = 18.3

Rounding up:

19 beers must be sampled.

7 0
2 years ago
I need help with this geometry question. Please show work:)
aliya0001 [1]
I think it would be 7.5!!

7 0
2 years ago
Write an equation involving absolute value for the graph if the points are located at 0 and 0.5
balu736 [363]

Answer:

bro im stuck too

Step-by-step explanation:

6 0
3 years ago
100<br> 200<br> 300<br> 400 500 600 700<br> Quantity Supplied<br> nstructions: Refer to the graph and answer the questions below
mash [69]

Answer:

a. 400

b. 4$

Step-by-step explanation:

2$ equals 0 Quantity

3$ equals 100 Quantity

4$ equals 200 Quantity

We can see that starting from 2$, a dollar will increase the Quantity by 100

7 0
1 year ago
Jamie can read at a speed of 65 pages per hour. If she reads a novel that has 400 pages, how long will it
horsena [70]
To find the answer set up an equation:
400 \: pages \times  \frac{1 \: hour}{65 \: pages}  =
Using this set up we can cross our units of pages since they are on opposite side of the proportion, leaving us with the desired units of hours.

Then divide 400 by 65 which will give us our answer: 6.15 or about 6 hours for Jamie to finish her reading.
8 0
2 years ago
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