Answer:
The correct option is b.
Step-by-step explanation:
The formula for standard deviation is
where, 
is mean of the data and n is number of observation.
The variance of a stock's returns can be calculated by the above formula.
Variance of stock's returns is the average value of squared deviations from the mean.
Therefore the correct option is b.
Rational is a number that can be expressed as a ratio of two in tegers where denominator is not equal to 0 is called a rational number.
Answer:
Step-by-step explanation:
Answer is given above with explanations .
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Answer:
1 and 2 are not polyhedrons, as a circle has infinite sides
1. cone, 1 vertex
2. sphere, nothing
3. pentagonal prism?
wait but can't every face be a base???
anyway 7 faces, 10 vertices
4. triangular prism
5 faces, 6 vertices
Step-by-step explanation:
Answer:
they are all multiples of 5
Step-by-step explanation:
when you count by five you will meet each number =D
