A boat traveled downstream a distance of 54 mi and then came back right back. If the speed of the current was 12 mph and the total trip took 6 hours, find the average speed of the boat relative to the water.

18 mph.-

Step-by-step explanation:

This is 2*54 / 6

= 18 m p h.

gdp is the best phrase!

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.