What is the surface area of the right triangle below?

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?