Question

A 17-foot pole is leaning against a wall. The bottom of the pole is 8 feet away from the bottom of the wall. Approximately how high up the wall does the top of the pole reach? 8 feet 9 feet 12 feet 15 feet

Answer 1

The answer is "15 feet" 

use the Pythagorean Theorem (a^2+b^2=c^2)  backwards.