What means of transportation were available to migrants crossing the united states during the different eras?

Earlier to the 1800s, settlers had to cross the United States by means of horses and wagons. By the early 1800s, canals began to assist opening up the interior. In the late 1800s, the railroads facilitated people settle down to earlier unreachable areas in the west. By the 1900s, the U.S. federal highway system assisted people effortlessly migrate through the country. 

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34

if you could provide the poem below, i'd be happy to you!

explanation:

you didn't give us the poem, or the title of the poem. but it is essential for you to give us that, otherwise we can not detect when the poem has a tonal shift!