An economy has three industries, farming, building, and clothing. For every dollar of food produced, the farmers use $0.07, the builders use $0.16, and the tailors use $0.03. For every dollar of building, the builders use $0.18, the farmers use $0.14, and the tailors use $0.09. For every dollar of clothing produced, the tailors use $0.04, the builders use $0.15, and the farmers use $0.07. If the external demand for food is $210 million, for building is $160 million, and for clothing is $170 million, what should be the total production for each industry

Penny poodle wanted to know which dog obedience training program was more effective: puppy pride, the approach she has been using for any years, or doggie do-right, a new approach. penny convinced 50 human companions of untrained dogs to participate in her study. the dogs and their humans were randomly assigned to complete the puppy pride or doggie do-right course. at the end of the training programs, all of the dogs were scored on their level of obedience on a standardized dog obedience checklist (scores could range from 10 to 100). the design of this study is: