. HELP ME PLEASE

Use only mathematical concepts, prove the following a valid formula.
O = *square root of O squared*
Be sure to use the method of L. H.S. and R. H.S. to ensure you get full marks.
Why do we need to calculate standard deviation if it is simply the square root of the
variance?

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "

the equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation:

[2, 2.5)

(2.5, 3]

step-by-step explanation:

i think its these two not sure [2, 2.5)

(2.5, 3]

150.6

all i did was i multiplied 5.02 by 30