How many ways can a twelve-member cheerleading squad (six men and six women) pair up to form six male-female teams? how many ways can six malefemale teams be positioned along a sideline? what might the number 6! 6! 26 represent? what might the number 6! 6! 26212 represent?

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.