The total cost per bottle is 1⁄48 of $62.84, or $1.31-.
SQUARE ROOT AND CUBE ROOT
Powers and Roots.—When a product consists of the same factor repeated any number of times it is called a power of that factor.
7 × 7 is the second power, or the square of 7.
7 × 7 × 7 is the third power, or the cube of 7.
A power of a number is generally expressed by writing the number only once, and placing after it, above the line, a small figure to show how many factors are to be taken. The small figure is called an index.
Thus, 72 = 49; 73 = 343; 74 = 2401.
A number is called the square root of its square.
Since 72 = 49, the square root of 49 is 7.
The “square root of 49” is written √49.