It always varies because solving a quadratic equation requires you to take a square root.
I do not have an answer to the second part of the first question.
As for the second question, I already answered it when you posted it separately.
Good luck :)
Answer : josh dub
no explanation
No,because 9 feet is way bigger than 1 foot.
Answer:
B. 21.64
Step-by-step explanation:
We have been given a triangle and we are asked to find the length of AC (b).
We will use law of cosines to find the length of side AC.

Upon substituting our given values in the formula we will get,
Upon taking square root of both sides of our equation we will be get,
Therefore, the length of b is 21.64 and option B is the correct choice.