What positive changes occurred due to westward expansion? Who benefited from westward expansion and why?

Explanation:

A positive change was the Louisiana purchase which was land that was bought from France in 1803 which gave the united States access to main trade routes which increased trade and faster travel to west railroads ( hope this helps)

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