A scientist collected 4 water samples from local streams. Each sample was the same size, and he collected 3.1 liters of water in all. To the nearest hundredth of a liter, what was the volume of each water sample?

Out of the 180 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking? 72% 40% 54% 98%