Need help on finding the perimeter in feet

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Divide. write in simplest form 41/6 divided by 10

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.