The Roma family wants to tip 15% of the total cost of their meal, which was $68.25. They left $15.00 on their table. Did they leave the correct amount? Explain. If not, what percentage of the total did they leave? pls help

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.