9. which one of the following statements is an example of an opinion?
a. my son's band performed at the aladdin theatre in portland last night. b. jason has been playing the guitar for more than ten years now. c. the concert last night was better than any of us expected. d. the group tends to play alternative music and their own compositions.

7

explanation:

it depends on what grade.

kindergarten to senior year in high school will go for about 7 hours. pre-k will go for bout 4-5 hours. college, it depends on your classes.

the rocket launch by showing how the population around it changes its behavior as the earth's influence over the martian planet when he uses the term "green star".

explanation: