What are irrigation systems used to deliver water to? A. fountains
B. swimming pools
C. lakes and rivers
D. trees and plants

By the triangle inequality theorem, if two sides of a triangle have lengths of 3 and 7, what are all the possible lengths of the third side? a) 3 < x < 8 b) 3 < x < 7 c) 4 < x < 10 d) 5 < x < 7

What season is it in the southern hemisphere when it’s december? a) fall b) spring c) winter d) summer

Explain the value of statistics and other data to positive economics and to normative economics