Find the distance between the two points:
A (20,19)
B (20,16)

A. 27.58

B. 25.61

Step-by-step explanation:

We have the distance formula√(a^2+b^2).

so, for A. we consider a to be 20 and b to be 19. putting the values in the formula we get the answer. we can do the same for B.

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.  

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right