## Basic College Mathematics (9th Edition)

The missing length is $39$ ft.
1. Find the missing length using the Pythagorean Formula $a^{2} + b^{2} = c^{2}$ $c = \sqrt(a^{2} + b^{2})$ $c = \sqrt(15^{2} + 36^{2})$ $c = \sqrt (1521)$ $c = 39$ ft