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uranmaximum [27]
3 years ago
10

The hands of a clock show the time 12:25 what kind of angle exists between the hands od the clock

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
7 0

Answer:

Obtuse Angle

Hope this helps :)

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A race is 10 kilometers long. Markers will be placed at the beginning and end of the race course and at each 500 meter mark. How
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Divide 24 apples between Roopa and Amita in ratio 5:7
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Roopa: 10

Amita: 14

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5x+7x=24

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Please simplify 3/5(25n-10y+5n)<br> please show work
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4 0
4 years ago
Consider the relationship between the number of bids an item on eBay received and the item's selling price. The following is a s
n200080 [17]

Answer:

Let's assume the following data:

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 \sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118  

r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974  

So then the correlation coefficient would be r =0.974

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

And 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]}}  

Let's assume the following data

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 \sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118  

r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974  

So then the correlation coefficient would be r =0.974

5 0
3 years ago
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