Final answer:
Yory needs 8.5 feet of material for each hat and scarf set; the major rivers in North America are the Missouri, Mississippi, and Colorado Rivers, and the Rockies and the Appalachians are in the Western and Eastern United States, respectively.
Step-by-step explanation:
Understanding Geography and Regions of North America
Firstly, let's address Yory's material needs for making hat and scarf sets. Each scarf requires 2 yards, and each hat requires 30 inches of material. Since 1 yard equals 3 feet, Yory will need 6 feet of material for a scarf.
To convert the hat material from inches to feet, there are 12 inches in a foot, so 30 inches is equal to 2.5 feet. Hence, for one hat and scarf set, Yory needs 8.5 feet of material. The question doesn't state how many sets are being made, so this answer is per set.
For the Geography portion, the three major rivers that flow through North America are the Missouri River, Mississippi River, and the Colorado River. The Great Lakes consist of Lakes Superior, Michigan, Huron, Erie, and Ontario. The Rocky Mountains primary region is in the Western United States, while the Appalachian Mountains are mainly in the Eastern United States.
Understanding the geography of North America is critical. The Colorado River, for instance, is essential for its annual flow and its role in supplying water to millions of people across various states as well as supporting agricultural needs.
Knowing the regions and physical features like the Rockies and the Appalachian Mountains is fundamental for grasping how geography affects climate, population, and economic activities.