anayajae24
05.06.2020 •
Mathematics
A student is standing 20 feet away from the base of a tree. He looks to the top of the tree at a 50° angle of elevation. His eyes are 5 feet above the ground. Using cos 50° ≈ 0.64, what is the height of the tree to the nearest foot?
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Ответ:
10/6=(2x+1)/(x+1)
10(x+1)=6(2x+1)
10x+10=12x+6
10-6=12x-10x
2x=4 /2
X=2