How many options are there for picking 5 students out of 30 to wash my car

Astudent simplified a rational expression as shown.

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.

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.