What is the answer for this problem?

Write the pair of fractions as a pair of fractions with a common denominator

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

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.