Squares, Cubes and Fourth Powers of whole numbers
The ^ is used to indicate an exponent.
The ^2 means exponent of 2 or square; ^3 means exponent of 3 or cube the ^4 is exponent of 4.
Remember there is a difference in the evaluating of: (3)^2 and 3^2. (3)^2 means to square 3 , that is write the 3 down twice and multiply: (3)(3) and this is +9. But the 3^2 means square only the 3. The 3 is written twice not the  . 3^2=  3 times 3 = 9.
The phrase "square of 20" is written as (20)^2 and is +400. The parenthesis are required because the phrase 20^2 means to square only the 20, thus answer is 400.
The exponent tells you how many times to write the BASE. Then you multiply.
3^4 : the 3 is the base and the 4 the exponent. 3^4: the 3 is the base, write it 4 times. (3)^4: the 3 is the base, write it 4 times.
Note the extra negative not inside the parenthesis. (4)^2 is not 4^2. It is 1(4)^2. Which do we do first multiply or exponents? Exponent so we get 1(16) or 16.


