If a series of license plates is to be prouder that all have the same pattern of three letters following by three numbers, roughly how many alphanumeric combinations are possible?

Each child in a class is at least 110 centimeters tall and at most 142 centimeters tall. How large must the class be in order to guarantee that there are at least 2 children whose heights (to the nearest centimeter) differ by at most 9 centimeters? O 5 0 6 O 3 O 33 32

Zip codes are assigned by region. In California, all zip codes begin with the number 9 while the seconddigit is restricted to numbers 0-6. The third digit is restricted to numbers 1-8 There is no restrictions onthe remaining digits. How many zip code combos are there.