Help me please I need to get this done today

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

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 florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Free points also plz look my profile and answer really stuff