College roommates John and David were driving home to the same town for the holidays. John drove 55 mph, and David, who left an hour later drove 60mph. How long will it take for David to catch up to John? If you’re answering can you give me the step-by-step because I don’t understand.

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.  

the answer is 48m^2!

step-by-step explanation: