Suppose that a local area network requires seven letters for user names. lower- and uppercase letters are considered the same. how many user names are possible for the local area network?

The police department is excited to have some new motorcycle units. one officer said that these motorcycles can go from 0 miles per hour to 80 miles per hour in just 6 seconds. the officer is describing the motorcycle's a. average speed. b. distance. c. average velocity. d. acceleration.