a school principal wanted to investigate student opinion about the food served in the school cafeteria. the principal selected at random samples of 50 first-year students, 50 second-year students, 50 third-year students, and 50 fourth-year students to complete a questionnaire. which of the following best describes the principal’s sampling plan?

Why was charliemagne hesitant about being crounded holy roman emperor?

Which of the following will increase a population's growth rate? read the following scenario and answer the question(s) below. population growth is at the root of many serious environmental problems. from the ancient babylonians thousands of years ago, to thomas malthus two centuries ago, to present day neo-malthusians, humans seem to possess an awareness of earth's limitations in the face of growing populations. today, our ability to accurately quantify and monitor population growth is very sophisticated. we can measure growth and make predictions about world growth with mathematical and computer models. despite long-lasting, rapid global population growth that is only recently starting to show signs of slowing, we have thus far been able to avoid global catastrophe. can we continue to avoid disaster? which of the following will increase a population's growth rate? increased urbanization increased industrialization increased immigration decreased immigration increased emigratio

How does cultural diffusion affect civilization