a 25-foot ladder is leaning against a house. the base of the ladder is pulled away from the house at a rate of 2 feet per second. How fast is the top...

The length
of the ladder is 25 feet. It is leaning against the wall of a house. The base of the ladder is
pulled away from the wall at 2 feet per second. Let B the distance of the base of the ladder
from the wall....