How do prevailing winds control precipitation totals in a region? check all that apply. they cause oceanic winds to carry water vapor. they move warm air masses in certain directions. they increase the occurrence of droughts in the winter. they reduce rainfall on the leeward side of a mountain. they affect the movement of winds that come from oceans.

The answers that apply;

Prevailing winds blow predominantly in one area of the earth and are mainly influenced by the sun and its position. The sun creates pressure systems. Cooler air masses in higher pressure systems blow towards the low-pressure systems with warm rising air. When the prevailing winds travel over oceans, they carry with them moisture and bring it inland causing precipitation.  

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle