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Please note that previous students who have completed this course have uniformly responded to course evaluation questionnaires indicating the need for between 10 and 15 hours per week minimum to be spent on this course . This simply informs the class that they need not respond since you will do that for them . Even if they are aware of this right , in many cases requests for legal assistance are not responded to in reasonable time frames . " Farmers have always responded to price signals from the marketplace , and historically we have had much more challenge with overproduction than shortage . Thus , civil engineers are continuously responding to society 's ecological and environmental problems by joining with other engineers , as well as with physical , biological , and social scientists , to protect our natural resources and to create a better physical and social environment for all people . Teach your children that they need not respond to abusive , threatening , or obscene remarks , whether on the playground or on the Net .