at a regional airport with an elevation of 56 meters below sea level, the observed station pressure is 1029 mb.

using the equations presented in the activity, mb must be the station pressure to correctly determine the sea level pressure value in mb.

a. 5.6 mb, subtracted from

b. 10.29 mb, subtracted from

c. 10.29 mb, added to

d. 5.6 mb, added to