Let s be the subset of the set of ordered pairs of integers defined recursively by: basis step: (0, 0) ∈ s. recursive step: if (a, b) ∈ s, then (a, b + 1) ∈ s, (a + 1, b + 1) ∈ s, and (a + 2, b + 1) ∈ s. a) list the elements of s produced by the first four applications of the recursive definition. b) use strong induction on the number of applications of the recursive step of the definition to show that a ≤ 2b whenever (a, b) ∈ s. c) use structural induction to show that a ≤ 2b whenever (a, b) ∈ s.

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step-by-step explanation:

because i said it is

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 11.2 (i know i’m late)

20 feet per second

hope i

-lavira : )