My teacher said there is two mistakes , can someone help me ? This is Triangle angle and side relationships for geometry.

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.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

What is the ratio of the length of an object in yards to the length of the same object in miles?