What is the area of an Octagon with a side length of 11.6.

A= 649.71

Step-by-step explanation:

A=2(1+2)a2

=2·(1+2)·11.62

≈649.71315

expression #3 is not equivalent. the others are.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.