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katen-ka-za [31]
3 years ago
14

The speed of light is 3 x 105 kilometers per second. What is that in standard form?

Mathematics
2 answers:
monitta3 years ago
8 0
v=3*10^{5} \frac{km}{s} =300 \ 000 \frac{km}{s}
spayn [35]3 years ago
4 0

Answer:

speed of light is 3 x 10^{8} meters per second.

Step-by-step explanation:

Given : The speed of light is 3 x 10^{5} kilometers per second.

To find :  What is that in standard form.

Solution : We have given 3 x 10^{5} kilometers per second.

First we convert it in to meter per sec.

We can write  

3 x 10^{5} = 300000 kilometer per second .

We know that 1 km = 1000 meter.

Then 300000000 meter per second

Now,   3 x 10^{8} meter per second.

Therefore,  speed of light is 3 x 10^{8} meters per second.

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Find the equation of the line passing through (2,-1) and parallel to the line 2x-y=4
Free_Kalibri [48]

Answer:

y = 2x - 5

Step-by-step explanation:

The equation has to have the same slope -- in this case, it is 2 -- to be parallel to 2x - y = 4.

Now we have y = 2x - k.

Then, we plug in the coordinates to our new equation to solve for k.

-1 = 2(2)-k

-1 = 4-k

k = 5

So the final equation would be y = 2x - 5

6 0
3 years ago
What is the area of a circle whose radius is 50?
Anna007 [38]

Answer:

area of circle=πr²=π50²=2500πunit²

6 0
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Raven is considering taking out a 30-year loan with monthly payments of
Anna007 [38]

Answer:

If Raven's monthly payment were $125, the amount of the loan that she is considering taking out  would be less than $43,205.56.

Step-by-step explanation:

If you think about it this way it may be more simple. If the APR stays constant then a greater payment will result in a greater loan. The opposite is also true meaning a lesser payment will result in a lesser loan. If the amount Raven pays is greater than $145 then the loan will be greater than $43,205.56. If the amount she pays is less than $145 then the loan will be less than $43,205.56. Of the options, only one of these situations will be present. In my case, the correct option was a payment of $125 will result in a lesser loan than $43,205.56.

6 0
3 years ago
A large on-demand, video streaming company is designing a large-scale survey to determine the mean amount of time corporate exec
Firdavs [7]

Answer:

554 executives should be surveyed.

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 - 0.95}{2} = 0.025

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 - 0.025 = 0.975, so Z = 1.96.

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.

Standard deviation of 3 hours.

This means that \sigma = 3

The 95% level of confidence is to be used. How many executives should be surveyed?

n executives should be surveyed, and n is found with M = 0.25. So

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

0.25 = 1.96\frac{3}{\sqrt{n}}

0.25\sqrt{n} = 1.96*3

\sqrt{n} = \frac{1.96*3}{0.25}

(\sqrt{n})^2 = (\frac{1.96*3}{0.25})^2

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Rounding up:

554 executives should be surveyed.

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