What is the total surface area of the figure?

Which equation represents the partial sum of the geometric series?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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