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kirill [66]
2 years ago
8

Look at circle B below. The circumference of the circle is approximately 157 units. Which best represents the area of circle B?

Mathematics
1 answer:
TiliK225 [7]2 years ago
5 0

Answer:

area of circle B=1964 square unit

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The answer is C. You pay $128 in the third hour for both. Hope this helped
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Assume that you have paired values consisting of heights​ (in inches) and weights​ (in lb) from 40 randomly selected men. The li
HACTEHA [7]

Answer:

R^2 = r^2 = 0.445^2= 0.198

B. The coefficient of determination is 0.1980, 19.8​% of the variation is explained by the linear​ correlation, and 80.2​% is explained by other factors.

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.  

Solution to the problem

In order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

On this case we got that r =0.445

The determinaton coefficient is just:

R^2 = r^2 = 0.445^2= 0.198

And we can put it on % and we got 19.8%. And represent the variation explained by a linear model. The best option on this case would be:

B. The coefficient of determination is 0.1980, 19.8​% of the variation is explained by the linear​ correlation, and 80.2​% is explained by other factors.

Since the explained variation is 19.8% and the remain 100-19.8= 80.2% is explained by other factors.

6 0
3 years ago
Can someone help me with this
spin [16.1K]

Answer:

Options A, C, and F

Step-by-step explanation:

4 0
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Read 2 more answers
Is 1.2/3 and 1.8/ 4/5 proportional
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Answer:

No

Step-by-step explanation:

1.2/3 =0.4

4/5 can be written as 0.8

So, 1.8/0.8 = 2.25.

However, 1.8/4/5 is the same as:

1.8/1 ÷ 4/5

Keep Change Flip

1.8/1 x 5/4 = 9/4

(1.8 x 5=9 & 1 x4 =4)

9/4 =2.25

3 0
3 years ago
ILL DO BRAINLIEST
Luden [163]

Answer:

a. X=6°

b. 6(6)-8= 28°

c. 28+( 5(6)-2) = 56°

4 0
2 years ago
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