Question

A slide is 21 ft long. To get to the top of the slide,you use a vertical 9 foot high rung ladder. What is the distance, b, from the bottom of the slide to the bottom of the Stairs? Round your answer to the nearest tenth.

Answer 1

19 is correct.

Explanation:

Answer 2

c²-a²=b²
21²-9²=b²
441-81=b²
360=b²
√360=b
18.97=b
19=b