un rayon tombe sur un mini disque en verre d'incidence 1.5 avec un angle d'incidence de 30 degre Tracer la marche du rayon (calcul et explication) ​

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.