CHAPTER 7 Powers, Roots, and Scientific Notation
Square roots are used to determine the time it would take for a stone falling from the edge of this cliff to hit the land below.
Suppose a stone falls from the edge of a cliff. The number of feet the stone has dropped after 
seconds can be found by multiplying 16 times the square of . But to calculate the number of seconds it would take the stone to hit the land below, we need to use a square root. In this chapter, we will introduce and apply the properties of exponents and square roots, and scientific notation.
