Kirk is reading a book and found that after 5 days he had read 180 pages. (a) At what rate is Kirk reading the book in units of pages per day?

36 pages per day

Step-by-step explanation:

180 divided by 5

The largest angle is opposite the side that measures 17.
We know all 3 sides so we will use the Law of Cosines
cosine (C) = (a^2 + b^2 -c^2) / 2ab
cosine (C) = ( 10^2 + 13^2 -17^2) / 2 * 10 * 13
cosine (C) = (100 + 169 -289) / 260
cosine (C) = -20 / 260
cosine (C) = -.0769230769
arc cosine (-.0769230769 ) = 94.412 Degrees

Source:
http://www.1728.org/trigtut2.htm