A code word consists of one or two letters and from two to four digits. How many code words are there if a code word must begin and end with a digit

answer; insolated i/o uses separate memory space,and on the other hand memory mapped i/o uses memory from the main

these  signals travel  down a part of the neuron called the axon, which is like a wire that carries the  signal  to othernerve  cells. on average a  nerve  cell sends a  signal  at about 50 meters per second, which is over 100  miles  an hour!