Mariela is standing in a building and looking out a window at a tree. the tree is 20 feet away from mariela, mariela's line of sight creates a 42 degree angle of elevation, and her line of sight creates a 31 degree of depression. what is the height, in feet, of the tree?

30.01 feet.

Step-by-step explanation:

You need to remember this identity:

Observe the figure attached, where is the height in feet of the tree.

You need to calculate of the Triangle 1, where:

Substitute values into and solve for :

Now you need to calculate of the Triangle 2, where:

Substitute values into and solve for :

Then the height in feet of the tree is:

32

step-by-step explanation:

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