00:01
We are being asked two different questions about five -digit zip codes.
00:05
First question is simply just how many five -digit zip codes are possible.
00:09
Well, if they say five digits, then remember each digit we're talking about, meaning it has to be a single number, there are going to be ten possibilities, right? because you have zero, one, two, three, four, five, six, seven, eight, nine.
00:25
That's it.
00:26
You can't do ten, right? or anything higher than that.
00:28
So, if we're talking about just how many five -digit zip codes in general, well, you can pick any number for your first digit, so ten possibilities for your first digit, you can pick any number for your second digit, so also ten possibilities.
00:45
In fact, all five spots have ten possibilities, because any of those five could be any number from zero to nine.
00:54
And so we simply just have to take ten times ten, times ten, times ten, times ten.
00:59
10 or 10 to the fifth to get our answer of 100 ,000, essentially 1 and 5 zeros...