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cricket20 [7]
3 years ago
11

Kelsy climbs up a volcano. When she is a quarter of the way up the volcano she is at a height of 125 m. How high is Kelsy from t

he bottom when she is 75 m below the top of the volcano?
Mathematics
2 answers:
cestrela7 [59]3 years ago
8 0
To find the height, multiply 125 by 4 and subtract 75 to find 75m below the top
125 x 4-75=425m

Leviafan [203]3 years ago
3 0
She is 425 feet above the sea level, or the starting level.  
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9514 1404 393

Answer:

  no solution

Step-by-step explanation:

The equations are inconsistent. The set of equations reduces to ...

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Answer:

The area of the figure is 7.5 units^2.

Step-by-step explanation:

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Read 2 more answers
A sample of 16 eggs yields a sample mean weight of 3.00 ounces and a sample standard deviation = 0.360 ounces, find the margin o
shusha [124]

Answer:

ME =1.753\frac{0.360}{\sqrt{16}}= 0.158

3-1.753\frac{0.360}{\sqrt{16}}=2.842    

3+1.753\frac{0.360}{\sqrt{16}}=3.158    

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".

\bar X=3 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=0.360 represent the sample standard deviation

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=16-1=15

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,15)".And we see that t_{\alpha/2}=1.753

The margin of error is given by:

ME =1.753\frac{0.360}{\sqrt{16}}= 0.158

Now we have everything in order to replace into formula (1):

3-1.753\frac{0.360}{\sqrt{16}}=2.842    

3+1.753\frac{0.360}{\sqrt{16}}=3.158    

So on this case the 90% confidence interval would be given by (2.842;3.158)    

3 0
3 years ago
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