Stateof Texas is divided into how many ecoregions

Distance that the transcontinental railroad covered from omaha to san francisco.

Which function is represented by the graph? o f(x) = -[x] + 4of(x) = -|*| – 4f(x) = -x + 4f(x) = -x - 41

In which layer of the atmosphere are the particles so far apart that they can travel hundreds of kilometers without colliding with each other? a.exosphere b.troposphere c.mesosphere d.thermosphere