In 2000, the population at arlington middle school was approximately 421 students. in 2010, the population was approximately 584 students. find the percent of change in the population at arlington middle school from 2000–2010 and identify it as an increase or decrease.

Atherapist at a free university clinic treats elementary school children with behavior problems who are referred by a social service agency. she is also a doctoral candidate who proposes using data she has and will collect about the children for a case-based research project. describe the type of parental permission which is required in this case?