4. did slaves signed contracts agreeing to work for a certain period of time before they were released from service

Values, conventions, clothing, and behaviors are part of a group's:

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling

From where do ocean waves obtain their energy