algebra
posted by Francisca .
A cable 25 feet long runs from the top of a utility pole to a point on the ground 18 feet from the base of the pole. How tall is the utility pole?

Pythagorean Theorem:
a^2 + b^2 = c^2
18^2 + b^2 = 25^2
324 + b^2 = 625
b^2 = 625  324
b^2 = 301
b = 17.349