## Introductory Algebra for College Students (7th Edition)

Use the Pythagorean Theorem. Let a be the height above the ground. $a^2+8^2=10^2$ Simplify. $a^2+64=100$ Subtract 64 from each side. $a^2+64-64=100-64$ Simplify. $a^2=36$ Take the square root of each side. $\sqrt{a^2}=\sqrt{36}$ Simplify and round. $a=6$