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2 years ago

What is 90% of 50? Someone please help. I have to write this for my question to get a good answer.

Mathematics

2 answers:

irina1246 [14]2 years ago

8 0

45÷50=90%
if that is what you are looking for

Ivanshal [37]2 years ago

6 0

90% • 50 is 45.

Hope this helps!

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Answer:

f(3)=5

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Step-by-step explanation:

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2 years ago

the performance score of 10 adults is recorded, and the results are 83 87 90 92 93 100 104 111 115 121 find the standard deviati

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Answer:

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Step-by-step explanation:

The Standard Deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma)

To find the standard deviation of the following data set

$\begin{array}{cccccccc}83&87&90&92&93&100&104&111\\115&121&&&&&&\end{array}$

we use the following formula

$\sigma = \sqrt{ \frac{ \sum{\left(x_i - \overline{X}\right)^2 }}{n-1} }$

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$Mean = \frac{Sum ~ of ~ terms}{Number ~ of ~ terms}$

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Step 2: Create the below table.

Step 3: Find the sum of numbers in the last column to get.

$\sum{\left(x_i - \overline{X}\right)^2} = 1472.4$

Step 4: Calculate σ using the above formula.

$\sigma = \sqrt{ \frac{ \sum{\left(x_i - \overline{X}\right)^2 }}{n-1} } = \sqrt{ \frac{ 1472.4 }{ 10 - 1} } \approx 12.7906$

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