What is the answer to this

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list