the math club keeps $2 for every $3 they earn during a fundraiser. They earn $90. How much money does the math club keep

$60

Step-by-step explanation:

90:3=30

30*2=60

70,000 + 6,000 + 800 + 30

step-by-step explanation:

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.