A security PIN code is four digits long. Each digit could have the value 0 to 9. If an office building needs 10 security PINs, express the number of codes in logarithmic form with base 10.
A security PIN code is four digits long. Each digit could have the value 0 to 9. If an office building needs 10 security PINs, express the number of codes in logarithmic form with base 10.
If digits can be repeated as in then there different codes.
If digits can not be repeated as in then there different codes.