Stupid question here : when did slavery start? i think it was either 1400s or 1616. i know it officially ended 1864.

The congress shall have power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defence and general welfare of the united states . .; to borrow money on the credit of the united states; to regulate commerce with foreign nations, and among the several states, and with the indian tribes. —constitution of the united states, article i, section 8 which of these are expressed powers granted by this part of article i, section 8? check all that apply. lay and collect taxes and duties pay debts regulate american indian groups regulate commerce within states borrow money regulate commerce with foreign nations

Two books are used to model tectonic plates

Which fact would this be, and how might you verify the truth?