Question

A 10-foot ladder is leaning against a tree. The bottom of the ladder is 4 feet away from the bottom of the tree. Approximately how high up the tree does the top of the ladder reach?. . . A.. 2.4 feet. . B.. 6 feet. . C.. 9.2 feet. . D.. 10.8 feet

Answer 1

Ladder=10 feet
bottom of ladder=4 feet
hight of tree=x
by using pythogorean theorem 
h^2=altitude^2+altitude^2
10^2=4^2+x^2
100=16+x^2
84=x^2
taking sqrt on both sides 
9.2=x
hope this helps