Hey, i need with this question! me fast, only answer if you will explain your work. the question is in the picture for the . 

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.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.