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Monica [59]
3 years ago
6

Answer The Question Below In The Image

Mathematics
1 answer:
storchak [24]3 years ago
4 0

Answer:

Isosceles Triangle

Step-by-step explanation:

Its less than a 90degrees angle

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A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the
NikAS [45]

Answer:

0.376-2.145\frac{0.0012}{\sqrt{15}}=0.375    

0.376+2.145\frac{0.0012}{\sqrt{15}}=0.377    

And we are 95% confident that the true mean of chloride concentration is between 0.375 and 0.377 cc/ cubic meter

Step-by-step explanation:

Data provided

\bar X=0.376 represent the sample mean for the chloride concentration

\mu population mean (variable of interest)

s=0.0012 represent the sample standard deviation

n=15 represent the sample size  

Confidence interval

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

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

Since we need to find the critical value first we need to begin finding the degreed of freedom

df=n-1=15-1=14

The Confidence is 0.95 or 95%, the significance would be \alpha=0.05 and \alpha/2 =0.025, and the critical value for this case with a t distribution with 14 degrees of freedom is t_{\alpha/2}=2.145

And the confidence interval is:

0.376-2.145\frac{0.0012}{\sqrt{15}}=0.375    

0.376+2.145\frac{0.0012}{\sqrt{15}}=0.377    

And we are 95% confident that the true mean of chloride concentration is between 0.375 and 0.377 cc/ cubic meter

7 0
3 years ago
Find the area of the circle below. Use 3.14 for pi
djverab [1.8K]

Answer:

Es igual a 28,26 centímetros2.

Step-by-step explanation:

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3 years ago
What is the value of x? Enter your answer in the box. x=
SOVA2 [1]
48 degrees, anything opposite of a degree on the same 2 infinite lines will always be the degree.
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The diameter of a circle is 6 inches. What is the circle's circumference?​
katrin2010 [14]

Answer:

brainiest? 37.68

Step-by-step explanation:

6 x 2 = 12

12 x 3.14 = 37.68

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Which table shows a linear function?<br> Will mark brainliest
IRISSAK [1]

Answer:

All of them

Step-by-step explanation:

none of the graphs repeat any numbers on the x

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