What is the length of the third side of the window frame below?

(figure is not drawn to scale.)

a picture of a right triangular window frame is shown. the longest side has length labeled as 87 inches. the height of the frame is labeled as 63 inches.

48 inches
60 inches
70 inches
75 inches

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

What is the total surface area of this square pyramid?