Find the volume. Round to the nearest whole number

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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