Who was the first president of the united states

What major land feature is located at 0* and 20* e? a sahara desert b kalahara desert c congo basin d the alps

Which of these innovations led to increased production in american factories in the early 1800s? a. the use of interchangeable parts b. the construction of canals c. the invention of the mechanical reaper d. the availability of electricity

What was the final battle of the civil war