How long a ladder must you have to reach the top of a 15-foot wall if the bottom of the ladder is placed 4 feet from the base of the wall? Round to the nearest tenth of a foot.
Set up a triangle with the ladder being the hypotenuse the wall being one side and the distance away being the other side. Now use pythagorean theorem a^2+b^2=c^2 4^2+15^2=c^2 16+225=c^2 241=c^2 C=15.52 now round C=15.5 feet
