O is the center of circle, find the
value of x from the given figure please .. it's urgent

Anyone know? will mark brainliest if correct!

Which number produces a rationale number when multiplied by 1/5

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