What has research determined about the orbit of an electron around a nucleus?

electrons orbit and remain with in specific energy rings.
electrons orbit the nucleus in circular motions exactly as shown on the classic bohr model.
each sub-level electron type has a unique path where it will likely be found.
electrons orbit in exact energy levels.

The average atmospheric pressure on earth is approximated as a function of altitude by the relation patm = 101.325 (1 − 0.02256z)5.256, where patm is the atmospheric pressure in kpa, and z is the altitude in km with z = 0 at sea level. determine the approximate atmospheric pressures at atlanta (z = 306 m), denver (z = 1610 m), mexico city (z = 2309 m), and the top of mount everest (z = 8848 m).