Can someone help me with this one ?

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

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Which numbers have the same absolute value? choose all that apply. asap will mark at brainliest