Your student email account requires you to choose a password of 4 letters followed by one of the digits 0-9. The password can consist of upper case letters (26) or lower case letters (26). How many different five-character passwords can be created?

520

Step-by-step explanation:

Total choices for letters = upper case letters (26) + lower case letters (26).

= 26+26 = 52

Choices for digits = 10

By Fundamental counting principle,

The different five character passwords can be created = (Choices for letters) x (Choices for digits)

= 52 x  10

= 520

Hence, the number of different five character passwords can be created = 520

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: