Dispositivos electrónicos que interpreta y ejecuta órdenes programadas​

The president has what role as the head of the armed forces 1.commander 2.general in chief 3.commander in chief 4.chief petty officer 5.joint chief

Who issued the ruling for the supreme court? dred scott roger b. taney abraham lincoln john c. calhoun

List three reasons why explorers began to explore new, and old areas. [[ps: doesn't explicitly say where. i think it's more in general.