Solve the problem. See Example 2.Length of a Ladder  A building is 2 ft from a 9-ft fence...

Solve the problem. See Example 2.

Length of a Ladder  A building is 2 ft from a 9-ft fence that surrounds the property. A worker wants to wash a window in the building 13 ft from the ground. He plans to place a ladder over the fence so it rests against the building. (See the figure.) He decides he should place the ladder 8 ft from the fence for stability. To the nearest tenth of a foot, how long a ladder will he need?

EXAMPLE 2

SOLVING A PROBLEM INVOLVING THE PYTHAGOREAN THEOREM