Which atmospheric layer protected the earth against the danger of the rocks?

Find the roots of the equation below. x^2 - 6 + 9 = 0

Which of the following is the graph of y= square root -x-3

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?