What benefits does USA gets from Panama canal?

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

Which part of a mountain receives the majority of moisture due to the rain shadow effect? a. the leeward side b. the windward side c. the bottom of the mountain d. all parts of the mountain receive equal amounts of moisture.

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer