Just 1 easy question

[HelpMePleaseplease]

can someone explain how to do this please very briefly i have a placement test tomorrow and i keep drawing a blank

or

or

all of them i have no clue

 

[Deleted member 4993]

can someone explain how to do this please very briefly i have a placement test tomorrow and i keep drawing a blank

or

or

all of them i have no clue

For a quick review go to:

http://www.purplemath.com/modules/exponent.htm