In a hostel, 30 students have food enough for 40 days. How many students should leave the hostel so that the food is enough for 100 days ?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Which units ate used to measure both velocity and speed? check all that apply

What are the student's observations and inferences before he starts his investigation?