PLS HELP OMG OMG OMG What is the fully factored form of the expression 9r2 - 100s2t2?

a
(9r + 100st) (r - st)
b
(9r - 100st) (r - st)
c
(3r + 10st) (3r - 10st)
d
(3r - 10st) (3r - 10st)

C

Step-by-step explanation:

We can notice the expression is the special product a^2 - b^2, which can be factored into (a + b)(a - b). By correlating the expression with the formula, we can say:

a^2 = 9r^2

-and-

b^2 = 100s^2t^2

Therefore:

a = 3r

-and-

b = 10st

Now we can substitute these values into the factored form, (a + b)(a - b):

(3r + 10st)(3r - 10st)

This is the same as option C, meaning C is the answer.

i think it's c

Step-by-step explanation:

srry if im wrong

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.  

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2