The following flowchart symbol is used to repeat instructions: A. Rectangle
B. Square
C. Circle
D. Hexagon

d

Explanation:

⇛σ=

n

∑f(x−

x

)

2

Find f(x-x^-)²

It's

313.29+806.45+474.32+72.9+58.19+532.9+605.16+0+497.29

3360.5

Now

\begin{gathered}\\ \rm\Rrightarrow \sigma=\sqrt{\dfrac{3360.5}{50}\end{gathered}

\begin{gathered}\\ \rm\Rrightarrow \sigma=\sqrt{67.21}\end{gathered}

⇛σ=

67.21

\begin{gathered}\\ \rm\Rrightarrow \sigma=8.2\end{gathered}

⇛σ=8.2

loool i m also trying to figure that out.seems like u should have genius ranking

this seems to be in the wrong category. but i'll take some free points my dude

posting this in wrong category will result in people seeing it who won't know the answer.