Besides goods and services, what did traders exchange in the ancient world?

How are decisions by the supreme court under chief justice john marshall strengthened federal power

The internet is controlled by: (select one): a. statutes and court cases in federal and state courts in the united states. b. the advanced research projects agency (arpa) and the u.s. department of defense. c. no single government or organization. d. google, yahoo, and the other search engines which have proprietary interest in the content thereon.

If both the president and the vice president can no longer serve, who will become the next head of state?