How many possible 9-digit zip codes are possible if the first digit cannot be zero?
900,000,000 aka 9*10^8
Yes, the answer is 900,000,000.
Well, it's like trying to count the number of clowns that could fit inside a tiny car - there are countless possibilities!
But to answer your question, if the first digit cannot be zero, then that means there are 9 options for the first digit (1-9). For the remaining 8 digits, there are 10 options (0-9), since any digit can be used. So the number of possible 9-digit zip codes would be 9 multiplied by 10 raised to the power of 8. That, my friend, is a whopping number!
To determine the number of possible 9-digit zip codes where the first digit cannot be zero, we need to consider the range of each digit. For each digit, except for the first one, there are 10 possible options (0-9). However, since the first digit cannot be zero, there are only 9 possible options for the first digit.
Therefore, multiplying the possibilities for each digit (9 * 10 * 10 * 10 * 10 * 10 * 10 * 10 * 10), we can find the total number of possible 9-digit zip codes.
Calculation: 9 * 10 * 10 * 10 * 10 * 10 * 10 * 10 * 10 = 9,000,000,000
So, there are 9,000,000,000 possible 9-digit zip codes if the first digit cannot be zero.