When can a/b be written as a negative, repeating decimal between 0 and 1?

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?