1-7x - 7=15 answer and show how you got answer

Which of the following is not a subset of {1,2,3}?

Joanie watched 1 out of three of a movie in the morning

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.