Last year the depth of the river was 4.2 feet deep. This year it dropped 12%.
Find the depth of the river this year to cross it.

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