What is 9/14 rounding to the nearest 10th as a decimal

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

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

Me i’m stuck on all these questions besides the two bottom ones