Mathematics

Problem

A 10-ft ladder rests against a vertical wall. The bottom of the ladder slides away from the wall at 2 ft/s. At what horizontal distance

x

(to the nearest tenth of a foot) is the area of the right triangle formed by the ladder, wall, and ground no longer changing? a)

10.0\text{ ft}

7.1\text{ ft}

5.0\text{ ft}

8.2\text{ ft}