A certain license plate has the combination: Letter - Letter - Number - Number - Letter

If there are 26 letters (A - Z) and 10 digits (0 - 9), and the letters and numbers do not repeat,
how many unique license plates can be formed?

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.