Las grandes civilizaciones americanas precolombinas compartieron ciertas características en sus desarrollos culturales, técnicos y materiales. Entre otras, ¿qué característica económica tuvieron en común estas civilizaciones? A) Base económica en la agricultura. B) Metalurgia basada en el hierro. C) Sistemas de agricultura de regadío. D) Sistema de intercambio basado únicamente en el trueque. E) Escasa presencia del Estado en la actividad productiva.

What problem does obeng say that we have in the 21st century? 2. obeng argues that the pace of change has eclipsed the pace of learning. do you agree or disagree? why? 3. what is "smart failure" according to obeng?

Which best describes california population when it became a state in 1850? a.because of the gold rush attracting settlers all over the world california population diverse.bcalifornia had banned foreign immigrants at the start of the gold rush.so,the states population was made up of entirely of americans from other parts of the country.c california had a large african population because many southern planters had moved their enslaved africans to start large farms.d the indian removal act had led to the relocation of thousands of eastern native americans to california.as,a result the majority of californias population was native american

How do the public-safety regulations protect workers ? regulations create advertising laws