An art teacher has a box of markers. he gives 15 markers to each student. he has 18 students. the teacher has 124 markers left over.

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

Name the most appropriate metric unit for each measurement

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33