Question

The bottom of a ladder must be placed 3.9 feet from a wall the ladder is 11 feet

Answer 1

Answer:

explain this question

Answer 2

Answer:

ladder, wall and ground will form a right angle triangle where ladder is hypotenus

Let dist of the foot of the ladder from the foot of the wall = d

11^2 = 3.9^2 + d^2

d^2 = 11^2 - 3.9^2=(11+3.9)(11-3.9)=14.9×7.1=105.79

d = √105.79 =10.29 Ans