Question 61142
length of the ladder is 15 ft
distance from the wall is7ft.
letthe height of the ladder from the bottom be h ft.
using pythagoras theorem we get the eqn.
(15)^2 =7^2 +h^2
225=49 +h^2
h^2=225-49
   =176 
h= square root of 176
 =13.27 
the top of the ladder is 13.27 ft. from the ground
good luck!!!