3 Matt purchased a 60-foot-long roll of chain-link fence.
He used the entire roll of fence to construct a
rectangular pen for his dog. Given that the pen is
12 feet wide, what is its length, in feet?
A. 5
B. 18
C. 24
D. 36
E. 48

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2