What animal attacks Brian in the middle of the night? 1. a bear
2. a moose
3. a porcupine
4. a lion

3. A porcupine.

Explanation:

From the file attached, the excerpt is from Chapter 8 of The Hatchet by Gary Paulsen where he describes how Brian was attacked in the middle of the night by a weird animal which he could not see in the darkness. From the narrative, the animal smelt of rot, it slithered and made a brushing sound towards his legs and he kicked out and threw a hatchet but missed.

His legs felt as if "a hundred needles have been driven into it" and he touched the group of needles that were stuck in his legs and discovered they were quils from a porcupine.

i agree, but what is the question here?

explanation:

the answer is

r ≈5.641

plug in the area of 100 yards into the equation

100=

divide each side by pi

≈ 31.8309=

take the square root of each side to find r

=r

r ≈5.641