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daser333 [38]
3 years ago
13

Which of the following the best describe a valence electron​

Mathematics
1 answer:
OlgaM077 [116]3 years ago
4 0

Answer:C. Valence electrons are shared between two atoms.

Step-by-step explanation:

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A high school coach wants to buy new shirts for the 25 members of the track team. The coach must spend less than $300 on the shi
aksik [14]
25 less than or equal too 300,not really enough information
3 0
3 years ago
The city of Madison regularly checks the quality of water at swimming beaches located on area lakes. Fifteen times the concentra
Maksim231197 [3]

Answer:

The sample standard deviation is 393.99

Step-by-step explanation:

The standard deviation of a sample can be calculated using the following formula:

s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }

Where:

s= Sample standart deviation

N= Number of observations in the sample

{\displaystyle \textstyle {\bar {x}}}= Mean value of the sample

and \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} } simbolizes the addition of the square of the difference between each observation and the mean value of the sample.

Let's start calculating the mean value:

\bar {x}=\frac{1}{N}  \sum_{i=1}^{N}x_{i}

\bar {x}=\frac{1}{15}*(180+1600+90+140+50+260+400+90+380+110+10+60+20+340+80)

\bar {x}=\frac{1}{15}*(3810)

\bar {x}=254

Now, let's calculate the summation:

\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=(180-254)^2+(1600-254)^2+(90-254)^2+...+(80-254)^2

\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=2173160

So, now we can calculate the standart deviation:

s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }

s=\sqrt[ ]{\frac{1}{15-1}*(2173160)}

s=\sqrt[ ]{\frac{2173160}{14}}

s=393.99

The sample standard deviation is 393.99

3 0
4 years ago
Order the following from greatest to least -0.4,0.8
JulijaS [17]
Certainly negative number is smaller than a positive number

So the order is 0.8 , -0.4
Here 0.8 is the greatest while -0.4 is least

Hope This Helps You!
3 0
3 years ago
When constructing parallel lines, how can you make sure the lines you constructed are parallel
Amiraneli [1.4K]
You can make sure the lines are parallel by looking at the slope. If both lines have the same slope they’re parallel.
3 0
3 years ago
Which of the following best describes the expression 12(x + 3)? (5 points) The product of a constant factor 12 and a 2-term fact
PIT_PIT [208]

Answer:

<u>The product of a constant factor 12 and a 2-term factor x + 3</u>

Step-by-step explanation:

hope this helps (*>*) :)

8 0
3 years ago
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