Each month, a water company charges its customers 4 cents for every gallon of water used. It also charges a $9 service fee. The amount of the total bill y varies
directly with the x gallons used. How many x gallons are used if the bill is $215?

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.