Researchers have found that smiling is something: 1. we learn to do as babies. 2. we learn to do in childhood. 3. that means different things in different countries. 4. that is innate; we don't learn to smile, we just do it.

Why do governments supply public goods and services instead of selling them to those people who use them

On which area of the map would you most likely find people belonging to the kurdish ethnic group? a) 1 b) 2 c) 3 d) 4 sroy no pic i could't do it

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.