Answer:
68.74%
Explanation:
To find the Standard Deviation:
First find expected return.
(0.7*100%)+(0.3*-50%) =70-15= 55%
Then the Variance.
[0.7*(1-0.55)^2]+[.3*(-0.5-0.55)^2]
=0.14175+0.33075
=0.4725
=47.25%
The Standard Deviation is the square root of the variance.

=0.6874
=68.74%
Because the cells always diverted when break down
It refers to genetic material taken up from the environment through bacterial cell walls.
In the ring of fire
It is called that because of all the volcanoes there