## Basic College Mathematics (10th Edition)

$h \approx 11.6$ ft
1. Find the length of the castle from the ground to the top of the ladder Let $h =$ the height $h^{2} + b^{2} = c^{2}$ $h = \sqrt {c^{2} - b^{2}}$ $h = \sqrt {12^{2} - 3^{2}}$ $h = \sqrt {135}$ $h = 11.618...$ ft $h \approx 11.6$ ft