QUICK!! I NEED HELP HOW DO I FIND THE PERIOD

y=cos(7)

The Answer is gonna be njjj

hlo buddy

good morning .

Step-by-step explanation:

this can be know with in two months of period at interval of time

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.  

i believe that the answer is

b. y-1=-2(x-4)

hope this !