Answer:
Step-by-step explanation:
Given that a fair coin is flipped twelve times.
It means the number of possible sequences of heads and tails would be:
2¹² = 4096
We can determine the number of ways that such a sequence could contain exactly 9 tails is the number of ways of choosing 9 out of 12, using the formula

Plug in n = 12 and r = 9


∵ 
∵ 

Thus, the probability will be:



Thus, the probability of the coin landing tails up exactly nine times will be:
Answer:
Step-by-step explanation:
given that both angles are the same, it is an equilateral right triangle.
we can use Pythagorean's theorem

Here you go. I hope you understand. Ask if you don't.
I believe the answer is D :)
Dear Whomever wrote this question,
I am so very sorry to inform you that I do not know this answer, yet, there are other sites such as quizlet that will show you the answers for the entire quiz so you do not have to look up each and every one individually. Please make me the Brainliest!