K is the midpoint of HL. H has coordinates (1, -7), and K has coordinates (9, 3). Find the coordinates of L.

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