How is e related to a period of elements?

1)e generally increases from right to left.
2)e generally decreases from right to left.
3)e is constant within any given period.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year