Question 2 Answer
Sid saves $8,000 into a savings account earning 4.5% interest. How long
will it take to double Sid's savings

You divide 72 by the annual rate of return you receive on your investments, and that number is a rough estimate of years it takes to double your money.

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.