The Central Pacific had to lay tracks around the

Pacific Ocean.

Mississippi River.

Appalachian Trail.

Sierra Nevada mountains.

Sierra Nevada Mountains

Explanation:

The Central Pacific laid 690 miles (1,110 km) of track, starting in Sacramento, California, in 1863 and continuing over the rugged 7,000-foot (2,100 m) Sierra Nevada mountains at Donner Pass into the new state of Nevada.

the correct answers are: 1) lay and collect taxes and duties; 2) pay debts; 5) borrow money;   6) regulate commerce with foreign nations.

article 1, section 8. refers to the powers of congress. according to the united states constitution: “the congress shall have the power to lay and collect taxes, duties, imposts, and excises, to pay the debts and provide for the common defense and general welfare of the united states.”