Acertain type of carpeting is 30 inches wide. how many yards of this carpet will be needed to cover a floor that measures 20 feet by 24 feet?

9 x 8 divided by (5-3)=36

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.